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Sixty-five (65, LXV) is a natural number following sixty-four and preceding sixty-six. It is a triangular number, and a Cullen number as well as a composite number with the divisors being 5 and 13. Its factorization is:

This number is the magic result of 5 by 5 magic square:

Sixty-five is also:

This article is about the number 65. For the year AD 65, see 65.