664927356 has 12 divisors (see below), whose sum is σ = 1551497192. Its totient is φ = 221642448.

The previous prime is 664927349. The next prime is 664927379. The reversal of 664927356 is 653729466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 27705295 + ... + 27705318.

Almost surely, 2^664927356 is an apocalyptic number.

It is an amenable number.

664927356 is an abundant number, since it is smaller than the sum of its proper divisors (886569836).

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

664927356 is a wasteful number, since it uses less digits than its factorization.

664927356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55410620 (or 55410618 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 48.

The square root of 664927356 is about 25786.1853712409. The cubic root of 664927356 is about 872.8200891775.

The spelling of 664927356 in words is "six hundred sixty-four million, nine hundred twenty-seven thousand, three hundred fifty-six".