664234564 has 12 divisors (see below), whose sum is σ = 1328469184. Its totient is φ = 284671944.

The previous prime is 664234513. The next prime is 664234579. The reversal of 664234564 is 465432466.

664234564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

664234564 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11861304 + ... + 11861359.

Almost surely, 2^664234564 is an apocalyptic number.

It is an amenable number.

664234564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664234564 is a wasteful number, since it uses less digits than its factorization.

664234564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23722674 (or 23722672 counting only the distinct ones).

The product of its digits is 414720, while the sum is 40.

The square root of 664234564 is about 25772.7484758611. The cubic root of 664234564 is about 872.5168515887.

The spelling of 664234564 in words is "six hundred sixty-four million, two hundred thirty-four thousand, five hundred sixty-four".