166525133 has 2 divisors, whose sum is σ = 166525134. Its totient is φ = 166525132.

The previous prime is 166525103. The next prime is 166525153. The reversal of 166525133 is 331525661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157301764 + 9223369 = 12542^2 + 3037^2 .

It is a cyclic number.

It is not a de Polignac number, because 166525133 - 2²² = 162330829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166525133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166525103) 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, 83262566 + 83262567.

It is an arithmetic number, because the mean of its divisors is an integer number (83262567).

Almost surely, 2^166525133 is an apocalyptic number.

It is an amenable number.

166525133 is a deficient number, since it is larger than the sum of its proper divisors (1).

166525133 is an equidigital number, since it uses as much as digits as its factorization.

166525133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

The square root of 166525133 is about 12904.4617477832. The cubic root of 166525133 is about 550.1653860758.

The spelling of 166525133 in words is "one hundred sixty-six million, five hundred twenty-five thousand, one hundred thirty-three".