Roulette is a casino game named after the French word meaning little wheel. In the game, players may choose to place bets on either a single number, various groupings of numbers, the colors red or black, whether the number is odd or even, or if the numbers are high (19–36) or low (1–18).
The sum of all the numbers on the roulette wheel (from 0 to 36) is 666, which is the "Number of the Beast".
666 (six hundred [and] sixty-six) is the natural number following 665 and preceding 667. 666 is called the "number of the Beast" in (most manuscripts of) chapter 13 of the Book of Revelation, of the New Testament, and also in popular culture.
Reference Link
https://en.wikipedia.org/wiki/Roulette