99999888866667 has 24 divisors (see below), whose sum is σ = 144720327464960. Its totient is φ = 66539251433520.

The previous prime is 99999888866651. The next prime is 99999888866693. The reversal of 99999888866667 is 76666888899999.

It is not a de Polignac number, because 99999888866667 - 2⁴ = 99999888866651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99999888866627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16244538 + ... + 21537984.

Almost surely, 2^{99999888866667} is an apocalyptic number.

99999888866667 is a deficient number, since it is larger than the sum of its proper divisors (44720438598293).

99999888866667 is a wasteful number, since it uses less digits than its factorization.

99999888866667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297463 (or 5297460 counting only the distinct ones).

The product of its digits is 2194196594688, while the sum is 108.

The spelling of 99999888866667 in words is "ninety-nine trillion, nine hundred ninety-nine billion, eight hundred eighty-eight million, eight hundred sixty-six thousand, six hundred sixty-seven".