665072916 has 48 divisors (see below), whose sum is σ = 1596923328. Its totient is φ = 215308800.

The previous prime is 665072909. The next prime is 665072917. The reversal of 665072916 is 619270566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665072917) 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 15 ways as a sum of consecutive naturals, for example, 89836 + ... + 96956.

It is an arithmetic number, because the mean of its divisors is an integer number (33269236).

Almost surely, 2^665072916 is an apocalyptic number.

It is an amenable number.

665072916 is an abundant number, since it is smaller than the sum of its proper divisors (931850412).

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

665072916 is a wasteful number, since it uses less digits than its factorization.

665072916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352 (or 7350 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 665072916 is about 25789.0076583028. The cubic root of 665072916 is about 872.8837745417.

The spelling of 665072916 in words is "six hundred sixty-five million, seventy-two thousand, nine hundred sixteen".