166671425 has 12 divisors (see below), whose sum is σ = 208163760. Its totient is φ = 132375120.

The previous prime is 166671413. The next prime is 166671443. The reversal of 166671425 is 524176661.

166671425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166671425 - 2⁶ = 166671361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20507 + ... + 27456.

It is an arithmetic number, because the mean of its divisors is an integer number (17346980).

Almost surely, 2^166671425 is an apocalyptic number.

It is an amenable number.

166671425 is a deficient number, since it is larger than the sum of its proper divisors (41492335).

166671425 is a wasteful number, since it uses less digits than its factorization.

166671425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48112 (or 48107 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 166671425 is about 12910.1287755003. The cubic root of 166671425 is about 550.3264453228.

The spelling of 166671425 in words is "one hundred sixty-six million, six hundred seventy-one thousand, four hundred twenty-five".