166575945 has 32 divisors (see below), whose sum is σ = 297060480. Its totient is φ = 79211520.

The previous prime is 166575931. The next prime is 166575953. The reversal of 166575945 is 549575661.

It is not a de Polignac number, because 166575945 - 2⁶ = 166575881 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166575894 and 166575903.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12346 + ... + 22035.

It is an arithmetic number, because the mean of its divisors is an integer number (9283140).

Almost surely, 2^166575945 is an apocalyptic number.

166575945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166575945 is a deficient number, since it is larger than the sum of its proper divisors (130484535).

166575945 is a wasteful number, since it uses less digits than its factorization.

166575945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34425.

The product of its digits is 1134000, while the sum is 48.

The square root of 166575945 is about 12906.4303740422. The cubic root of 166575945 is about 550.2213379117.

The spelling of 166575945 in words is "one hundred sixty-six million, five hundred seventy-five thousand, nine hundred forty-five".