166425773 has 2 divisors, whose sum is σ = 166425774. Its totient is φ = 166425772.

The previous prime is 166425757. The next prime is 166425799. The reversal of 166425773 is 377524661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158206084 + 8219689 = 12578^2 + 2867^2 .

It is a cyclic number.

It is not a de Polignac number, because 166425773 - 2⁴ = 166425757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166425773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166425703) 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, 83212886 + 83212887.

It is an arithmetic number, because the mean of its divisors is an integer number (83212887).

Almost surely, 2^166425773 is an apocalyptic number.

It is an amenable number.

166425773 is a deficient number, since it is larger than the sum of its proper divisors (1).

166425773 is an equidigital number, since it uses as much as digits as its factorization.

166425773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 41.

The square root of 166425773 is about 12900.6113421031. The cubic root of 166425773 is about 550.0559425191.

The spelling of 166425773 in words is "one hundred sixty-six million, four hundred twenty-five thousand, seven hundred seventy-three".