78616656 has 50 divisors (see below), whose sum is σ = 227543162. Its totient is φ = 26205120.

The previous prime is 78616597. The next prime is 78616663. The reversal of 78616656 is 65661687.

It can be written as a sum of positive squares in only one way, i.e., 54997056 + 23619600 = 7416^2 + 4860^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 29035 + ... + 31626.

Almost surely, 2^78616656 is an apocalyptic number.

It is an amenable number.

78616656 is an abundant number, since it is smaller than the sum of its proper divisors (148926506).

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

78616656 is a wasteful number, since it uses less digits than its factorization.

78616656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60681 (or 60666 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 78616656 is about 8866.6034082956. The cubic root of 78616656 is about 428.3888799693.

The spelling of 78616656 in words is "seventy-eight million, six hundred sixteen thousand, six hundred fifty-six".