The sum of all the numbers on a roulette wheel is 666.

The story behind the answer

True. On a standard roulette wheel, the numbered pockets run from 1 to 36. The sum of 1 through 36 is a triangular number: n(n+1)/2, so 36×37/2 = 666. The zero pocket (and the additional 00 on American wheels) doesn’t change this, since 0 contributes nothing and “00” isn’t a separate integer value.

This eerie total inspired the nickname “the Devil’s wheel,” linking it to 666 from the Book of Revelation. A handy memory trick: 36 is 6×6, and the sum of 1 to 36 gives three sixes—666.