166125277 has 2 divisors, whose sum is σ = 166125278. Its totient is φ = 166125276.

The previous prime is 166125269. The next prime is 166125287. The reversal of 166125277 is 772521661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164711556 + 1413721 = 12834^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 166125277 - 2³ = 166125269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166125257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83062638 + 83062639.

It is an arithmetic number, because the mean of its divisors is an integer number (83062639).

Almost surely, 2^166125277 is an apocalyptic number.

It is an amenable number.

166125277 is a deficient number, since it is larger than the sum of its proper divisors (1).

166125277 is an equidigital number, since it uses as much as digits as its factorization.

166125277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 166125277 is about 12888.9595002855. The cubic root of 166125277 is about 549.7246853487.

The spelling of 166125277 in words is "one hundred sixty-six million, one hundred twenty-five thousand, two hundred seventy-seven".