664770404 has 12 divisors (see below), whose sum is σ = 1224577200. Its totient is φ = 314891208.

The previous prime is 664770383. The next prime is 664770437. The reversal of 664770404 is 404077466.

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 4373414 + ... + 4373565.

It is an arithmetic number, because the mean of its divisors is an integer number (102048100).

Almost surely, 2^664770404 is an apocalyptic number.

It is an amenable number.

664770404 is a deficient number, since it is larger than the sum of its proper divisors (559806796).

664770404 is a wasteful number, since it uses less digits than its factorization.

664770404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8747002 (or 8747000 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 38.

The square root of 664770404 is about 25783.1418566473. The cubic root of 664770404 is about 872.7514091744.

The spelling of 664770404 in words is "six hundred sixty-four million, seven hundred seventy thousand, four hundred four".