99999988666667 has 2 divisors, whose sum is σ = 99999988666668. Its totient is φ = 99999988666666.

The previous prime is 99999988666663. The next prime is 99999988666691. The reversal of 99999988666667 is 76666688999999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99999988666667 - 2² = 99999988666663 is a prime.

It is not a weakly prime, because it can be changed into another prime (99999988666663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999994333333 + 49999994333334.

It is an arithmetic number, because the mean of its divisors is an integer number (49999994333334).

Almost surely, 2^{99999988666667} is an apocalyptic number.

99999988666667 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999988666667 is an equidigital number, since it uses as much as digits as its factorization.

99999988666667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1851353376768, while the sum is 107.

The spelling of 99999988666667 in words is "ninety-nine trillion, nine hundred ninety-nine billion, nine hundred eighty-eight million, six hundred sixty-six thousand, six hundred sixty-seven".