665603600904 has 96 divisors (see below), whose sum is σ = 1967244027840. Its totient is φ = 201627504000.

The previous prime is 665603600899. The next prime is 665603600933. The reversal of 665603600904 is 409006306566.

It is a self number, because there is not a number n which added to its sum of digits gives 665603600904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2140954 + ... + 2432054.

It is an arithmetic number, because the mean of its divisors is an integer number (20492125290).

Almost surely, 2^665603600904 is an apocalyptic number.

It is an amenable number.

665603600904 is an abundant number, since it is smaller than the sum of its proper divisors (1301640426936).

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

665603600904 is a wasteful number, since it uses less digits than its factorization.

665603600904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294011 (or 294004 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The spelling of 665603600904 in words is "six hundred sixty-five billion, six hundred three million, six hundred thousand, nine hundred four".