8999998666679 has 2 divisors, whose sum is σ = 8999998666680. Its totient is φ = 8999998666678.

The previous prime is 8999998666657. The next prime is 8999998666739. The reversal of 8999998666679 is 9766668999998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8999998666679 - 2⁸ = 8999998666423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8999998663679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4499999333339 + 4499999333340.

It is an arithmetic number, because the mean of its divisors is an integer number (4499999333340).

Almost surely, 2^{8999998666679} is an apocalyptic number.

8999998666679 is a deficient number, since it is larger than the sum of its proper divisors (1).

8999998666679 is an equidigital number, since it uses as much as digits as its factorization.

8999998666679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 308558896128, while the sum is 101.

The spelling of 8999998666679 in words is "eight trillion, nine hundred ninety-nine billion, nine hundred ninety-eight million, six hundred sixty-six thousand, six hundred seventy-nine".