56664020906 has 32 divisors (see below), whose sum is σ = 86902200000. Its totient is φ = 27702214272.

The previous prime is 56664020899. The next prime is 56664020971. The reversal of 56664020906 is 60902046665.

56664020906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×56664020906² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20611220 + ... + 20613968.

It is an arithmetic number, because the mean of its divisors is an integer number (2715693750).

Almost surely, 2^56664020906 is an apocalyptic number.

56664020906 is a deficient number, since it is larger than the sum of its proper divisors (30238179094).

56664020906 is a wasteful number, since it uses less digits than its factorization.

56664020906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 56664020906 in words is "fifty-six billion, six hundred sixty-four million, twenty thousand, nine hundred six".