166278966 has 32 divisors (see below), whose sum is σ = 381604608. Its totient is φ = 47316000.

The previous prime is 166278943. The next prime is 166278991. The reversal of 166278966 is 669872661.

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 15 ways as a sum of consecutive naturals, for example, 2656 + ... + 18428.

It is an arithmetic number, because the mean of its divisors is an integer number (11925144).

Almost surely, 2^166278966 is an apocalyptic number.

166278966 is an abundant number, since it is smaller than the sum of its proper divisors (215325642).

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

166278966 is a wasteful number, since it uses less digits than its factorization.

166278966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16036.

The product of its digits is 1306368, while the sum is 51.

The square root of 166278966 is about 12894.9201626067. The cubic root of 166278966 is about 549.8941570432.

The spelling of 166278966 in words is "one hundred sixty-six million, two hundred seventy-eight thousand, nine hundred sixty-six".