78660904 has 64 divisors (see below), whose sum is σ = 181958400. Its totient is φ = 31110144.

The previous prime is 78660877. The next prime is 78660917. The reversal of 78660904 is 40906687.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49677 + ... + 51235.

It is an arithmetic number, because the mean of its divisors is an integer number (2843100).

Almost surely, 2^78660904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78660904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90979200).

78660904 is an abundant number, since it is smaller than the sum of its proper divisors (103297496).

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

78660904 is a wasteful number, since it uses less digits than its factorization.

78660904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642 (or 1638 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 78660904 is about 8869.0982630705. The cubic root of 78660904 is about 428.4692352741.

The spelling of 78660904 in words is "seventy-eight million, six hundred sixty thousand, nine hundred four".