99664400 has 60 divisors (see below), whose sum is σ = 261222864. Its totient is φ = 36240000.

The previous prime is 99664391. The next prime is 99664403. The reversal of 99664400 is 446699.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99664403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6926 + ... + 15725.

Almost surely, 2^99664400 is an apocalyptic number.

It is an amenable number.

99664400 is an abundant number, since it is smaller than the sum of its proper divisors (161558464).

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

99664400 is a wasteful number, since it uses less digits than its factorization.

99664400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22680 (or 22669 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 99664400 is about 9983.2058979067. The cubic root of 99664400 is about 463.6390623496.

The spelling of 99664400 in words is "ninety-nine million, six hundred sixty-four thousand, four hundred".