166891466 has 16 divisors (see below), whose sum is σ = 286301760. Its totient is φ = 71474400.

The previous prime is 166891447. The next prime is 166891469. The reversal of 166891466 is 664198661.

It is a super-2 number, since 2×166891466² = 55705522847258312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166891466.

It is not an unprimeable number, because it can be changed into a prime (166891469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21905 + ... + 28523.

It is an arithmetic number, because the mean of its divisors is an integer number (17893860).

Almost surely, 2^166891466 is an apocalyptic number.

166891466 is a deficient number, since it is larger than the sum of its proper divisors (119410294).

166891466 is a wasteful number, since it uses less digits than its factorization.

166891466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8429.

The product of its digits is 373248, while the sum is 47.

The square root of 166891466 is about 12918.6479942756. The cubic root of 166891466 is about 550.5685206725.

The spelling of 166891466 in words is "one hundred sixty-six million, eight hundred ninety-one thousand, four hundred sixty-six".