166610646 has 12 divisors (see below), whose sum is σ = 360989772. Its totient is φ = 55536876.

The previous prime is 166610627. The next prime is 166610651. The reversal of 166610646 is 646016661.

It is a self number, because there is not a number n which added to its sum of digits gives 166610646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4628056 + ... + 4628091.

It is an arithmetic number, because the mean of its divisors is an integer number (30082481).

Almost surely, 2^166610646 is an apocalyptic number.

166610646 is an abundant number, since it is smaller than the sum of its proper divisors (194379126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166610646 is a wasteful number, since it uses less digits than its factorization.

166610646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9256155 (or 9256152 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 166610646 is about 12907.7746339173. The cubic root of 166610646 is about 550.2595425176.

The spelling of 166610646 in words is "one hundred sixty-six million, six hundred ten thousand, six hundred forty-six".