166425075 has 36 divisors (see below), whose sum is σ = 306157488. Its totient is φ = 86356800.

The previous prime is 166425059. The next prime is 166425101. The reversal of 166425075 is 570524661.

It is a happy number.

166425075 is a `hidden beast` number, since 1 + 6 + 642 + 5 + 0 + 7 + 5 = 666.

It is not a de Polignac number, because 166425075 - 2⁴ = 166425059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1671 + ... + 18320.

Almost surely, 2^166425075 is an apocalyptic number.

166425075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166425075 is a deficient number, since it is larger than the sum of its proper divisors (139732413).

166425075 is a wasteful number, since it uses less digits than its factorization.

166425075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20044 (or 20036 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 166425075 is about 12900.5842890933. The cubic root of 166425075 is about 550.0551735284.

The spelling of 166425075 in words is "one hundred sixty-six million, four hundred twenty-five thousand, seventy-five".