166901249 has 2 divisors, whose sum is σ = 166901250. Its totient is φ = 166901248.

The previous prime is 166901243. The next prime is 166901261. The reversal of 166901249 is 942109661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143233024 + 23668225 = 11968^2 + 4865^2 .

It is a cyclic number.

It is not a de Polignac number, because 166901249 - 2⁴ = 166901233 is a prime.

It is not a weakly prime, because it can be changed into another prime (166901243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83450624 + 83450625.

It is an arithmetic number, because the mean of its divisors is an integer number (83450625).

Almost surely, 2^166901249 is an apocalyptic number.

It is an amenable number.

166901249 is a deficient number, since it is larger than the sum of its proper divisors (1).

166901249 is an equidigital number, since it uses as much as digits as its factorization.

166901249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 166901249 is about 12919.0266274205. The cubic root of 166901249 is about 550.5792783757.

The spelling of 166901249 in words is "one hundred sixty-six million, nine hundred one thousand, two hundred forty-nine".