166883666 has 4 divisors (see below), whose sum is σ = 250325502. Its totient is φ = 83441832.

The previous prime is 166883657. The next prime is 166883671. The reversal of 166883666 is 666388661.

166883666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 165662641 + 1221025 = 12871^2 + 1105^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41720915 + ... + 41720918.

Almost surely, 2^166883666 is an apocalyptic number.

166883666 is a deficient number, since it is larger than the sum of its proper divisors (83441836).

166883666 is an equidigital number, since it uses as much as digits as its factorization.

166883666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83441835.

The product of its digits is 1492992, while the sum is 50.

The square root of 166883666 is about 12918.3461015720. The cubic root of 166883666 is about 550.5599432389.

The spelling of 166883666 in words is "one hundred sixty-six million, eight hundred eighty-three thousand, six hundred sixty-six".