78761664 has 42 divisors (see below), whose sum is σ = 225757740. Its totient is φ = 26253696.

The previous prime is 78761659. The next prime is 78761677. The reversal of 78761664 is 46616787.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67794 + ... + 68945.

Almost surely, 2^78761664 is an apocalyptic number.

It is an amenable number.

78761664 is an abundant number, since it is smaller than the sum of its proper divisors (146996076).

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

78761664 is a wasteful number, since it uses less digits than its factorization.

78761664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136757 (or 136744 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 78761664 is about 8874.7768422648. The cubic root of 78761664 is about 428.6521051930.

The spelling of 78761664 in words is "seventy-eight million, seven hundred sixty-one thousand, six hundred sixty-four".