The number '666' is often referred to as the "Number of the Beast." It has cultural and religious significance primarily in Christianity, where it is mentioned in the Book of Revelation as associated with the end times and representing evil or the Antichrist.
The origin of the number '666' comes from the Christian biblical text in Revelation 13:18, where it is described as the numerical representation of the name of the beast. Its significance has evolved in various cultural interpretations over centuries, often symbolizing sin and rebellion against God.