665313672 has 32 divisors (see below), whose sum is σ = 1669438080. Its totient is φ = 220950720.

The previous prime is 665313659. The next prime is 665313697. The reversal of 665313672 is 276313566.

665313672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 665313672.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44643 + ... + 57650.

It is an arithmetic number, because the mean of its divisors is an integer number (52169940).

Almost surely, 2^665313672 is an apocalyptic number.

It is an amenable number.

665313672 is an abundant number, since it is smaller than the sum of its proper divisors (1004124408).

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

665313672 is a wasteful number, since it uses less digits than its factorization.

665313672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102573 (or 102569 counting only the distinct ones).

The product of its digits is 136080, while the sum is 39.

The square root of 665313672 is about 25793.6750386602. The cubic root of 665313672 is about 872.9890896372.

The spelling of 665313672 in words is "six hundred sixty-five million, three hundred thirteen thousand, six hundred seventy-two".