77996656 has 10 divisors (see below), whose sum is σ = 151118552. Its totient is φ = 38998320.

The previous prime is 77996627. The next prime is 77996671. The reversal of 77996656 is 65669977.

It is a junction number, because it is equal to n+sod(n) for n = 77996597 and 77996606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2437380 + ... + 2437411.

Almost surely, 2^77996656 is an apocalyptic number.

It is an amenable number.

77996656 is a deficient number, since it is larger than the sum of its proper divisors (73121896).

77996656 is a wasteful number, since it uses less digits than its factorization.

77996656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874799 (or 4874793 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 55.

The square root of 77996656 is about 8831.5715475786. The cubic root of 77996656 is about 427.2597621976.

The spelling of 77996656 in words is "seventy-seven million, nine hundred ninety-six thousand, six hundred fifty-six".