665080916 has 12 divisors (see below), whose sum is σ = 1168035540. Its totient is φ = 331356480.

The previous prime is 665080907. The next prime is 665080937. The reversal of 665080916 is 619080566.

It can be written as a sum of positive squares in 2 ways, for example, as 165379600 + 499701316 = 12860^2 + 22354^2 .

It is a congruent number.

It is an unprimeable number.

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, 294731 + ... + 296978.

It is an arithmetic number, because the mean of its divisors is an integer number (97336295).

Almost surely, 2^665080916 is an apocalyptic number.

It is an amenable number.

665080916 is a deficient number, since it is larger than the sum of its proper divisors (502954624).

665080916 is a wasteful number, since it uses less digits than its factorization.

665080916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591994 (or 591992 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 665080916 is about 25789.1627626800. The cubic root of 665080916 is about 872.8872744298.

The spelling of 665080916 in words is "six hundred sixty-five million, eighty thousand, nine hundred sixteen".