669594864 has 40 divisors (see below), whose sum is σ = 1750637952. Its totient is φ = 220507840.

The previous prime is 669594859. The next prime is 669594881. The reversal of 669594864 is 468495966.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80052 + ... + 88019.

Almost surely, 2^669594864 is an apocalyptic number.

It is an amenable number.

669594864 is an abundant number, since it is smaller than the sum of its proper divisors (1081043088).

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

669594864 is a wasteful number, since it uses less digits than its factorization.

669594864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168165 (or 168159 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 57.

The square root of 669594864 is about 25876.5311431034. The cubic root of 669594864 is about 874.8576046921.

The spelling of 669594864 in words is "six hundred sixty-nine million, five hundred ninety-four thousand, eight hundred sixty-four".