166686966 has 48 divisors (see below), whose sum is σ = 367153488. Its totient is φ = 54648000.

The previous prime is 166686929. The next prime is 166686967. The reversal of 166686966 is 669686661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166686967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 503421 + ... + 503751.

It is an arithmetic number, because the mean of its divisors is an integer number (7649031).

Almost surely, 2^166686966 is an apocalyptic number.

166686966 is an abundant number, since it is smaller than the sum of its proper divisors (200466522).

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

166686966 is a wasteful number, since it uses less digits than its factorization.

166686966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 714 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 166686966 is about 12910.7306532202. The cubic root of 166686966 is about 550.3435495494.

The spelling of 166686966 in words is "one hundred sixty-six million, six hundred eighty-six thousand, nine hundred sixty-six".