664585306512 has 80 divisors (see below), whose sum is σ = 1726490652288. Its totient is φ = 220284887040.

The previous prime is 664585306471. The next prime is 664585306523. The reversal of 664585306512 is 215603585466.

It is a super-2 number, since 2×664585306512² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) 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 15 ways as a sum of consecutive naturals, for example, 23173462 + ... + 23202122.

Almost surely, 2^664585306512 is an apocalyptic number.

It is an amenable number.

664585306512 is an abundant number, since it is smaller than the sum of its proper divisors (1061905345776).

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

664585306512 is a wasteful number, since it uses less digits than its factorization.

664585306512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31368 (or 31362 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 51.

The spelling of 664585306512 in words is "six hundred sixty-four billion, five hundred eighty-five million, three hundred six thousand, five hundred twelve".