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666 (number) Facts for Kids. *Kiddle Encyclopedia.*

**666** is a natural number after 665 and before 667. It is a number with many properties. One of these properties is that it is the sum of the first 36 natural numbers. That makes 666 a triangular number. 666 is the sum of the first 144 decimals (digits after the decimal point) of pi. The bible says that the number 666 is associated with the devil.

All content from Kiddle encyclopedia articles (including the article images and facts) can be freely used under Attribution-ShareAlike license, unless stated otherwise. Cite this article:

666 (number) Facts for Kids. - This page was last modified on 11 March 2020, at 22:45.