56664013 has 8 divisors (see below), whose sum is σ = 65856960. Its totient is φ = 47745600.

The previous prime is 56663993. The next prime is 56664037. The reversal of 56664013 is 31046665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56664013 - 2¹⁷ = 56532941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56664053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68188 + ... + 69013.

It is an arithmetic number, because the mean of its divisors is an integer number (8232120).

Almost surely, 2^56664013 is an apocalyptic number.

It is an amenable number.

56664013 is a deficient number, since it is larger than the sum of its proper divisors (9192947).

56664013 is a wasteful number, since it uses less digits than its factorization.

56664013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137267.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 56664013 is about 7527.5502655246. The cubic root of 56664013 is about 384.0924550419.

The spelling of 56664013 in words is "fifty-six million, six hundred sixty-four thousand, thirteen".