18626166 has 64 divisors (see below), whose sum is σ = 45124800. Its totient is φ = 5694624.

The previous prime is 18626141. The next prime is 18626171. The reversal of 18626166 is 66162681.

18626166 is a `hidden beast` number, since 18 + 626 + 16 + 6 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18626166.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 118560 + ... + 118716.

It is an arithmetic number, because the mean of its divisors is an integer number (705075).

Almost surely, 2^18626166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18626166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22562400).

18626166 is an abundant number, since it is smaller than the sum of its proper divisors (26498634).

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

18626166 is a wasteful number, since it uses less digits than its factorization.

18626166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 175 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18626166 is about 4315.8042124267. The cubic root of 18626166 is about 265.0784910485.

The spelling of 18626166 in words is "eighteen million, six hundred twenty-six thousand, one hundred sixty-six".