I went to an FAQ and found the exact ranks. Here they are. The negative ones are for those who cheat. Not counting the cheat ranks, there are 50 ranks. I am on rank 48/50 unless there is something at 2 million or something,

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- Criminal Rating Ranks -
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Total Liar........................................ ? -6001
Cheater.......................................... -6000 -4001
Hacker............................................ -4000 -2001
Embarrassment........................... -2000 -501
Untrustworthy................................ -500 -1
Upstanding Citizen...................... 0 19
Nobody Special............................ 20 49
Litterer............................................ 50 74
Shoplifter....................................... 75 99
Vandal........................................... 100 119
Do Boy........................................... 120 149
Pickpocket....................................150 199
Clepto........................................... 200 240
Snitch............................................ 241 269
Rat................................................. 270 299
Leece............................................ 300 334
Scam Artist.................................. 335 369
Trickster....................................... 370 399
Numbers Runner....................... 400 449
Hustler.......................................... 450 499
Bully.............................................. 500 549
Riff-Raff........................................ 550 599
Scalawag..................................... 600 609
Ruffian.......................................... 610 649
Outlaw.......................................... 650 699
Thug............................................. 700 849
Drop Man.................................... 850 999
SA Goon....................................... 1000 1004
Goon............................................. 1005 1299
Ex-Con.......................................... 1300 1499
Felon............................................. 1500 1699
Bag Man....................................... 1700 1999
Wiseguy........................................ 2000 2099
Wheelman................................... 2100 2299
Hired Muscle............................... 2300 2499
Hatchetman.................................. 2500 2749
Headhunter.................................. 2750 2999
Enforcer........................................ 3000 3499
Ronin............................................. 3500 3999
Fixer................................................ 4000 4999
Hitman........................................... 5000 7499
Associate....................................... 7500 9999
Butcher........................................... 10000 19999
Cleaner.......................................... 20000 29999
Assassin........................................ 30000 39999
Consigliere.................................... 40000 49999
Made Man...................................... 50000 64999
Right-Hand Man........................... 65000 79999
Executioner.................................... 80000 99999
Lieutenant...................................... 100000 149999
Underboss.................................... 150000 199999
Capo................................................ 200000 299999
Boss................................................ 300000 499999
Don................................................. 500000 999999
Godfather................................................. 1000000 ?