16646166 has 24 divisors (see below), whose sum is σ = 37965720. Its totient is φ = 5256576.

The previous prime is 16646099. The next prime is 16646167. The reversal of 16646166 is 66164661.

16646166 is a `hidden beast` number, since 1 + 6 + 646 + 1 + 6 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16646166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16646167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23995 + ... + 24678.

It is an arithmetic number, because the mean of its divisors is an integer number (1581905).

Almost surely, 2^16646166 is an apocalyptic number.

16646166 is an abundant number, since it is smaller than the sum of its proper divisors (21319554).

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

16646166 is a wasteful number, since it uses less digits than its factorization.

16646166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48700 (or 48697 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 16646166 is about 4079.9713234286. The cubic root of 16646166 is about 255.3317021319.

The spelling of 16646166 in words is "sixteen million, six hundred forty-six thousand, one hundred sixty-six".