166885963 has 4 divisors (see below), whose sum is σ = 166916248. Its totient is φ = 166855680.

The previous prime is 166885951. The next prime is 166885969. The reversal of 166885963 is 369588661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166885963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166885963.

It is not an unprimeable number, because it can be changed into a prime (166885969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4278 + ... + 18763.

It is an arithmetic number, because the mean of its divisors is an integer number (41729062).

Almost surely, 2^166885963 is an apocalyptic number.

166885963 is a deficient number, since it is larger than the sum of its proper divisors (30285).

166885963 is an equidigital number, since it uses as much as digits as its factorization.

166885963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30284.

The product of its digits is 1866240, while the sum is 52.

The square root of 166885963 is about 12918.4350058357. The cubic root of 166885963 is about 550.5624692109.

The spelling of 166885963 in words is "one hundred sixty-six million, eight hundred eighty-five thousand, nine hundred sixty-three".