166910387099 has 2 divisors, whose sum is σ = 166910387100. Its totient is φ = 166910387098.

The previous prime is 166910387093. The next prime is 166910387101. The reversal of 166910387099 is 990783019661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166910387099 is a prime.

Together with 166910387101, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166910387093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83455193549 + 83455193550.

It is an arithmetic number, because the mean of its divisors is an integer number (83455193550).

Almost surely, 2^166910387099 is an apocalyptic number.

166910387099 is a deficient number, since it is larger than the sum of its proper divisors (1).

166910387099 is an equidigital number, since it uses as much as digits as its factorization.

166910387099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 59.

The spelling of 166910387099 in words is "one hundred sixty-six billion, nine hundred ten million, three hundred eighty-seven thousand, ninety-nine".