166939033 has 2 divisors, whose sum is σ = 166939034. Its totient is φ = 166939032.

The previous prime is 166939007. The next prime is 166939043. The reversal of 166939033 is 330939661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107910544 + 59028489 = 10388^2 + 7683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166939033 is a prime.

It is not a weakly prime, because it can be changed into another prime (166939043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83469516 + 83469517.

It is an arithmetic number, because the mean of its divisors is an integer number (83469517).

Almost surely, 2^166939033 is an apocalyptic number.

It is an amenable number.

166939033 is a deficient number, since it is larger than the sum of its proper divisors (1).

166939033 is an equidigital number, since it uses as much as digits as its factorization.

166939033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 40.

The square root of 166939033 is about 12920.4888839393. The cubic root of 166939033 is about 550.6208229376.

The spelling of 166939033 in words is "one hundred sixty-six million, nine hundred thirty-nine thousand, thirty-three".