168665099 has 2 divisors, whose sum is σ = 168665100. Its totient is φ = 168665098.

The previous prime is 168665089. The next prime is 168665149. The reversal of 168665099 is 990566861.

It is an a-pointer prime, because the next prime (168665149) can be obtained adding 168665099 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168665099 - 2⁴ = 168665083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168665039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84332549 + 84332550.

It is an arithmetic number, because the mean of its divisors is an integer number (84332550).

Almost surely, 2^168665099 is an apocalyptic number.

168665099 is a deficient number, since it is larger than the sum of its proper divisors (1).

168665099 is an equidigital number, since it uses as much as digits as its factorization.

168665099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 168665099 is about 12987.1128046229. The cubic root of 168665099 is about 552.5120342990.

The spelling of 168665099 in words is "one hundred sixty-eight million, six hundred sixty-five thousand, ninety-nine".