166574425 has 18 divisors (see below), whose sum is σ = 218007438. Its totient is φ = 126239040.

The previous prime is 166574411. The next prime is 166574437. The reversal of 166574425 is 524475661.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 22382361 + 144192064 = 4731^2 + 12008^2 .

It is not a de Polignac number, because 166574425 - 2⁷ = 166574297 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

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 in 17 ways as a sum of consecutive naturals, for example, 204 + ... + 18253.

Almost surely, 2^166574425 is an apocalyptic number.

It is an amenable number.

166574425 is a deficient number, since it is larger than the sum of its proper divisors (51433013).

166574425 is a wasteful number, since it uses less digits than its factorization.

166574425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18505 (or 18481 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 166574425 is about 12906.3714885323. The cubic root of 166574425 is about 550.2196643228.

The spelling of 166574425 in words is "one hundred sixty-six million, five hundred seventy-four thousand, four hundred twenty-five".