99988888667 has 4 divisors (see below), whose sum is σ = 99990255456. Its totient is φ = 99987521880.

The previous prime is 99988888631. The next prime is 99988888717. The reversal of 99988888667 is 76688888999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99988888667 - 2⁶ = 99988888603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99988888067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567059 + ... + 722172.

It is an arithmetic number, because the mean of its divisors is an integer number (24997563864).

Almost surely, 2^99988888667 is an apocalyptic number.

99988888667 is a deficient number, since it is larger than the sum of its proper divisors (1366789).

99988888667 is a wasteful number, since it uses less digits than its factorization.

99988888667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366788.

The product of its digits is 6019743744, while the sum is 86.

The spelling of 99988888667 in words is "ninety-nine billion, nine hundred eighty-eight million, eight hundred eighty-eight thousand, six hundred sixty-seven".