166541425 has 12 divisors (see below), whose sum is σ = 208559196. Its totient is φ = 131912000.

The previous prime is 166541399. The next prime is 166541429. The reversal of 166541425 is 524145661.

It can be written as a sum of positive squares in 6 ways, for example, as 4717584 + 161823841 = 2172^2 + 12721^2 .

It is not a de Polignac number, because 166541425 - 2¹⁷ = 166410353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166541429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30454 + ... + 35503.

It is an arithmetic number, because the mean of its divisors is an integer number (17379933).

Almost surely, 2^166541425 is an apocalyptic number.

It is an amenable number.

166541425 is a deficient number, since it is larger than the sum of its proper divisors (42017771).

166541425 is a wasteful number, since it uses less digits than its factorization.

166541425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66068 (or 66063 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 166541425 is about 12905.0929868792. The cubic root of 166541425 is about 550.1833273159.

The spelling of 166541425 in words is "one hundred sixty-six million, five hundred forty-one thousand, four hundred twenty-five".