99642656 has 12 divisors (see below), whose sum is σ = 196171542. Its totient is φ = 49821312.

The previous prime is 99642617. The next prime is 99642671. The reversal of 99642656 is 65624699.

It can be written as a sum of positive squares in only one way, i.e., 98803600 + 839056 = 9940^2 + 916^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 99642656.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556885 + ... + 1556948.

Almost surely, 2^99642656 is an apocalyptic number.

It is an amenable number.

99642656 is a deficient number, since it is larger than the sum of its proper divisors (96528886).

99642656 is a wasteful number, since it uses less digits than its factorization.

99642656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113843 (or 3113835 counting only the distinct ones).

The product of its digits is 699840, while the sum is 47.

The square root of 99642656 is about 9982.1168095750. The cubic root of 99642656 is about 463.6053421813.

The spelling of 99642656 in words is "ninety-nine million, six hundred forty-two thousand, six hundred fifty-six".