166565007 has 12 divisors (see below), whose sum is σ = 274964560. Its totient is φ = 95179968.

The previous prime is 166564961. The next prime is 166565017. The reversal of 166565007 is 700565661.

It is a happy number.

It is not a de Polignac number, because 166565007 - 2⁸ = 166564751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166565017) 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, 1321882 + ... + 1322007.

Almost surely, 2^166565007 is an apocalyptic number.

166565007 is a deficient number, since it is larger than the sum of its proper divisors (108399553).

166565007 is a wasteful number, since it uses less digits than its factorization.

166565007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643902 (or 2643899 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 166565007 is about 12906.0066248240. The cubic root of 166565007 is about 550.2092944506.

The spelling of 166565007 in words is "one hundred sixty-six million, five hundred sixty-five thousand, seven".