8999998666665 has 32 divisors (see below), whose sum is σ = 15031167964416. Its totient is φ = 4589750457600.

The previous prime is 8999998666657. The next prime is 8999998666679. The reversal of 8999998666665 is 5666668999998.

It is not a de Polignac number, because 8999998666665 - 2³ = 8999998666657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3390886 + ... + 5431215.

It is an arithmetic number, because the mean of its divisors is an integer number (469723998888).

Almost surely, 2^{8999998666665} is an apocalyptic number.

It is an amenable number.

8999998666665 is a deficient number, since it is larger than the sum of its proper divisors (6031169297751).

8999998666665 is a wasteful number, since it uses less digits than its factorization.

8999998666665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8825089.

The product of its digits is 146932807680, while the sum is 96.

The spelling of 8999998666665 in words is "eight trillion, nine hundred ninety-nine billion, nine hundred ninety-eight million, six hundred sixty-six thousand, six hundred sixty-five".