8999998666667 has 4 divisors (see below), whose sum is σ = 9000005125800. Its totient is φ = 8999992207536.

The previous prime is 8999998666657. The next prime is 8999998666679. The reversal of 8999998666667 is 7666668999998.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8999998666667 - 2⁸ = 8999998666411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8999998666657) 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, 179018 + ... + 4246415.

It is an arithmetic number, because the mean of its divisors is an integer number (2250001281450).

Almost surely, 2^{8999998666667} is an apocalyptic number.

8999998666667 is a deficient number, since it is larger than the sum of its proper divisors (6459133).

8999998666667 is a wasteful number, since it uses less digits than its factorization.

8999998666667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6459132.

The product of its digits is 205705930752, while the sum is 98.

The spelling of 8999998666667 in words is "eight trillion, nine hundred ninety-nine billion, nine hundred ninety-eight million, six hundred sixty-six thousand, six hundred sixty-seven".