672404660 has 24 divisors (see below), whose sum is σ = 1422834336. Its totient is φ = 266907680.

The previous prime is 672404659. The next prime is 672404669. The reversal of 672404660 is 66404276.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 672404660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672404669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125702 + ... + 130941.

It is an arithmetic number, because the mean of its divisors is an integer number (59284764).

Almost surely, 2^672404660 is an apocalyptic number.

It is an amenable number.

672404660 is an abundant number, since it is smaller than the sum of its proper divisors (750429676).

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

672404660 is a wasteful number, since it uses less digits than its factorization.

672404660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256783 (or 256781 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 672404660 is about 25930.7666681878. The cubic root of 672404660 is about 876.0796077997.

The spelling of 672404660 in words is "six hundred seventy-two million, four hundred four thousand, six hundred sixty".