Numbers are magical in nature. Some people claim that according to their observations, certain numbers appear wherever they turn their eyes, and attribute this to supernatural forces. Also in math: The way some numbers behave can seem striking. Even Pythagoras, the great Greek mathematician, found mystical properties in some numbers that took possession of his imagination. In some cases, numbers acquire worship status, appearing in popular culture, religion, mythology, or affecting historical events ("911," "Catch-22," "Room 101" ("Room 101"), 666 - Antichrist number).