665952904 has 16 divisors (see below), whose sum is σ = 1249297920. Its totient is φ = 332806800.

The previous prime is 665952901. The next prime is 665952919. The reversal of 665952904 is 409259566.

It is not an unprimeable number, because it can be changed into a prime (665952901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3672 + ... + 36679.

It is an arithmetic number, because the mean of its divisors is an integer number (78081120).

Almost surely, 2^665952904 is an apocalyptic number.

It is an amenable number.

665952904 is a deficient number, since it is larger than the sum of its proper divisors (583345016).

665952904 is a wasteful number, since it uses less digits than its factorization.

665952904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42420 (or 42416 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 665952904 is about 25806.0633185304. The cubic root of 665952904 is about 873.2685888461.

The spelling of 665952904 in words is "six hundred sixty-five million, nine hundred fifty-two thousand, nine hundred four".