99988888664 has 32 divisors (see below), whose sum is σ = 215024436000. Its totient is φ = 42699874560.

The previous prime is 99988888631. The next prime is 99988888717. The reversal of 99988888664 is 46688888999.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3161339 + ... + 3192810.

It is an arithmetic number, because the mean of its divisors is an integer number (6719513625).

Almost surely, 2^99988888664 is an apocalyptic number.

It is an amenable number.

99988888664 is an abundant number, since it is smaller than the sum of its proper divisors (115035547336).

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

99988888664 is a wasteful number, since it uses less digits than its factorization.

99988888664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6354443 (or 6354439 counting only the distinct ones).

The product of its digits is 3439853568, while the sum is 83.

The spelling of 99988888664 in words is "ninety-nine billion, nine hundred eighty-eight million, eight hundred eighty-eight thousand, six hundred sixty-four".