634665904 has 20 divisors (see below), whose sum is σ = 1234949976. Its totient is φ = 315969152.

The previous prime is 634665901. The next prime is 634665917. The reversal of 634665904 is 409566436.

634665904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (634665901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81394 + ... + 88849.

Almost surely, 2^634665904 is an apocalyptic number.

It is an amenable number.

634665904 is a deficient number, since it is larger than the sum of its proper divisors (600284072).

634665904 is a wasteful number, since it uses less digits than its factorization.

634665904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170484 (or 170478 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 634665904 is about 25192.5763668586. The cubic root of 634665904 is about 859.3730350130.

The spelling of 634665904 in words is "six hundred thirty-four million, six hundred sixty-five thousand, nine hundred four".