166539606 has 16 divisors (see below), whose sum is σ = 333491904. Its totient is φ = 55444424.

The previous prime is 166539589. The next prime is 166539613. The reversal of 166539606 is 606935661.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11820 + ... + 21743.

It is an arithmetic number, because the mean of its divisors is an integer number (20843244).

Almost surely, 2^166539606 is an apocalyptic number.

166539606 is an abundant number, since it is smaller than the sum of its proper divisors (166952298).

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

166539606 is a wasteful number, since it uses less digits than its factorization.

166539606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34395.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 166539606 is about 12905.0225106352. The cubic root of 166539606 is about 550.1813242364.

The spelling of 166539606 in words is "one hundred sixty-six million, five hundred thirty-nine thousand, six hundred six".