166831266 has 16 divisors (see below), whose sum is σ = 381328704. Its totient is φ = 47666064.

The previous prime is 166831253. The next prime is 166831289. The reversal of 166831266 is 662138661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1986045 + ... + 1986128.

It is an arithmetic number, because the mean of its divisors is an integer number (23833044).

Almost surely, 2^166831266 is an apocalyptic number.

166831266 is an abundant number, since it is smaller than the sum of its proper divisors (214497438).

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

166831266 is a wasteful number, since it uses less digits than its factorization.

166831266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3972185.

The product of its digits is 62208, while the sum is 39.

The square root of 166831266 is about 12916.3178189452. The cubic root of 166831266 is about 550.5023135505.

The spelling of 166831266 in words is "one hundred sixty-six million, eight hundred thirty-one thousand, two hundred sixty-six".