78766956 has 18 divisors (see below), whose sum is σ = 199105452. Its totient is φ = 26255640.

The previous prime is 78766937. The next prime is 78766999. The reversal of 78766956 is 65966787.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

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, 1093950 + ... + 1094021.

It is an arithmetic number, because the mean of its divisors is an integer number (11061414).

Almost surely, 2^78766956 is an apocalyptic number.

It is an amenable number.

78766956 is an abundant number, since it is smaller than the sum of its proper divisors (120338496).

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

78766956 is a wasteful number, since it uses less digits than its factorization.

78766956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187981 (or 2187976 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 78766956 is about 8875.0749855987. The cubic root of 78766956 is about 428.6617053632.

The spelling of 78766956 in words is "seventy-eight million, seven hundred sixty-six thousand, nine hundred fifty-six".