667790928 has 60 divisors (see below), whose sum is σ = 2135874208. Its totient is φ = 190797120.

The previous prime is 667790861. The next prime is 667791011. The reversal of 667790928 is 829097766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330238 + ... + 332253.

Almost surely, 2^667790928 is an apocalyptic number.

It is an amenable number.

667790928 is an abundant number, since it is smaller than the sum of its proper divisors (1468083280).

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

667790928 is a wasteful number, since it uses less digits than its factorization.

667790928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662512 (or 662503 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 667790928 is about 25841.6510308455. The cubic root of 667790928 is about 874.0712553202.

The spelling of 667790928 in words is "six hundred sixty-seven million, seven hundred ninety thousand, nine hundred twenty-eight".