166539017 has 2 divisors, whose sum is σ = 166539018. Its totient is φ = 166539016.

The previous prime is 166539013. The next prime is 166539041. The reversal of 166539017 is 710935661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110229001 + 56310016 = 10499^2 + 7504^2 .

It is a cyclic number.

It is not a de Polignac number, because 166539017 - 2² = 166539013 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166539011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83269508 + 83269509.

It is an arithmetic number, because the mean of its divisors is an integer number (83269509).

Almost surely, 2^166539017 is an apocalyptic number.

It is an amenable number.

166539017 is a deficient number, since it is larger than the sum of its proper divisors (1).

166539017 is an equidigital number, since it uses as much as digits as its factorization.

166539017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 166539017 is about 12904.9996900426. Note that the first 3 decimals coincide. The cubic root of 166539017 is about 550.1806756276.

The spelling of 166539017 in words is "one hundred sixty-six million, five hundred thirty-nine thousand, seventeen".