What is 66?

66 is a number with several interesting mathematical properties and cultural significances.

  • Mathematically, 66 is an even number and a composite number. Its divisors are 1, 2, 3, 6, 11, 22, 33, and 66. It's also a triangular number, being the sum of the first eleven positive integers (1+2+3+...+11 = 66).

  • In some cultures, 66 can hold symbolic meaning, though it's not as universally recognized as other numbers like 7 or 13. Its significance often depends on specific numerological interpretations.

  • It is the atomic number of Dysprosium (Dy).