664864088536 has 16 divisors (see below), whose sum is σ = 1246655003400. Its totient is φ = 332422754304.

The previous prime is 664864088501. The next prime is 664864088579. The reversal of 664864088536 is 635880468466.

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, 852246 + ... + 1433893.

Almost surely, 2^664864088536 is an apocalyptic number.

It is an amenable number.

664864088536 is a deficient number, since it is larger than the sum of its proper divisors (581790914864).

664864088536 is a wasteful number, since it uses less digits than its factorization.

664864088536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322498 (or 2322494 counting only the distinct ones).

The product of its (nonzero) digits is 159252480, while the sum is 64.

The spelling of 664864088536 in words is "six hundred sixty-four billion, eight hundred sixty-four million, eighty-eight thousand, five hundred thirty-six".