9976998656 has 18 divisors (see below), whose sum is σ = 19915025172. Its totient is φ = 4988499200.

The previous prime is 9976998653. The next prime is 9976998659. The reversal of 9976998656 is 6568996799.

It is an interprime number because it is at equal distance from previous prime (9976998653) and next prime (9976998659).

It is not an unprimeable number, because it can be changed into a prime (9976998653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19486070 + ... + 19486581.

Almost surely, 2^9976998656 is an apocalyptic number.

It is an amenable number.

9976998656 is a deficient number, since it is larger than the sum of its proper divisors (9938026516).

9976998656 is an equidigital number, since it uses as much as digits as its factorization.

9976998656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38972667 (or 38972653 counting only the distinct ones).

The product of its digits is 396809280, while the sum is 74.

The square root of 9976998656 is about 99884.9270711052. The cubic root of 9976998656 is about 2152.7815921532.

The spelling of 9976998656 in words is "nine billion, nine hundred seventy-six million, nine hundred ninety-eight thousand, six hundred fifty-six".