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

The statement that the sum of all the numbers on a roulette wheel is 666 is not true. The sum of the numbers on a standard roulette wheel is actually 666½. A roulette wheel consists of the numbers 1 to 36, which add up to 666. Additionally, there is a single zero (0) or double zero (00) on most wheels, adding an additional ½ to the sum. Hence, the correct statement would be that the sum of all the numbers on a roulette wheel is 666½.