166577923 has 2 divisors, whose sum is σ = 166577924. Its totient is φ = 166577922.

The previous prime is 166577909. The next prime is 166577927. The reversal of 166577923 is 329775661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166577923 is a prime.

It is not a weakly prime, because it can be changed into another prime (166577927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83288961 + 83288962.

It is an arithmetic number, because the mean of its divisors is an integer number (83288962).

Almost surely, 2^166577923 is an apocalyptic number.

166577923 is a deficient number, since it is larger than the sum of its proper divisors (1).

166577923 is an equidigital number, since it uses as much as digits as its factorization.

166577923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 46.

The square root of 166577923 is about 12906.5070022838. The cubic root of 166577923 is about 550.2235157642.

The spelling of 166577923 in words is "one hundred sixty-six million, five hundred seventy-seven thousand, nine hundred twenty-three".