166775039 has 2 divisors, whose sum is σ = 166775040. Its totient is φ = 166775038.

The previous prime is 166775023. The next prime is 166775041. The reversal of 166775039 is 930577661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166775039 - 2⁴ = 166775023 is a prime.

Together with 166775041, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166775069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83387519 + 83387520.

It is an arithmetic number, because the mean of its divisors is an integer number (83387520).

Almost surely, 2^166775039 is an apocalyptic number.

166775039 is a deficient number, since it is larger than the sum of its proper divisors (1).

166775039 is an equidigital number, since it uses as much as digits as its factorization.

166775039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 166775039 is about 12914.1410477043. The cubic root of 166775039 is about 550.4404614921.

The spelling of 166775039 in words is "one hundred sixty-six million, seven hundred seventy-five thousand, thirty-nine".