9999999680 has 224 divisors, whose sum is σ = 26663904000. Its totient is φ = 3541544960.

The previous prime is 9999999679. The next prime is 9999999701. The reversal of 9999999680 is 869999999.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37174586 + ... + 37174854.

Almost surely, 2^9999999680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999999680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13331952000).

9999999680 is an abundant number, since it is smaller than the sum of its proper divisors (16663904320).

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

9999999680 is a wasteful number, since it uses less digits than its factorization.

9999999680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 229582512, while the sum is 77.

The square root of 9999999680 is about 99999.9984000000. The cubic root of 9999999680 is about 2154.4346670512.

The spelling of 9999999680 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred eighty".