99717066990 has 48 divisors (see below), whose sum is σ = 259911012816. Its totient is φ = 26524896000.

The previous prime is 99717066989. The next prime is 99717067001. The reversal of 99717066990 is 9966071799.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1345416 + ... + 1417595.

It is an arithmetic number, because the mean of its divisors is an integer number (5414812767).

Almost surely, 2^99717066990 is an apocalyptic number.

99717066990 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99717066990 is an abundant number, since it is smaller than the sum of its proper divisors (160193945826).

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

99717066990 is a wasteful number, since it uses less digits than its factorization.

99717066990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763425 (or 2763422 counting only the distinct ones).

The product of its (nonzero) digits is 11573604, while the sum is 63.

The spelling of 99717066990 in words is "ninety-nine billion, seven hundred seventeen million, sixty-six thousand, nine hundred ninety".