If the Devil owns all dollar notes with "666" somewhere in their serial number, then he's a rich fellow. By my reckoning, there are 600,000 possible "666 serial numbers" in an 8-digit series from 00000000 to 99999999, giving you a one in 166 chance of finding one.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis