664637360552 has 64 divisors (see below), whose sum is σ = 1364475101760. Its totient is φ = 301000550400.

The previous prime is 664637360549. The next prime is 664637360599. The reversal of 664637360552 is 255063736466.

It is a junction number, because it is equal to n+sod(n) for n = 664637360494 and 664637360503.

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, 40095338 + ... + 40111910.

It is an arithmetic number, because the mean of its divisors is an integer number (21319923465).

Almost surely, 2^664637360552 is an apocalyptic number.

It is an amenable number.

664637360552 is an abundant number, since it is smaller than the sum of its proper divisors (699837741208).

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

664637360552 is a wasteful number, since it uses less digits than its factorization.

664637360552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18234 (or 18230 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 53.

The spelling of 664637360552 in words is "six hundred sixty-four billion, six hundred thirty-seven million, three hundred sixty thousand, five hundred fifty-two".