64656713 has 12 divisors (see below), whose sum is σ = 72807924. Its totient is φ = 57340800.

The previous prime is 64656673. The next prime is 64656719. The reversal of 64656713 is 31765646.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18593344 + 46063369 = 4312^2 + 6787^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64656713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64656719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1556 + ... + 11477.

It is an arithmetic number, because the mean of its divisors is an integer number (6067327).

Almost surely, 2^64656713 is an apocalyptic number.

It is an amenable number.

64656713 is a deficient number, since it is larger than the sum of its proper divisors (8151211).

64656713 is a wasteful number, since it uses less digits than its factorization.

64656713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13096 (or 13085 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 64656713 is about 8040.9398082562. The cubic root of 64656713 is about 401.3634989786.

The spelling of 64656713 in words is "sixty-four million, six hundred fifty-six thousand, seven hundred thirteen".