18166612 has 12 divisors (see below), whose sum is σ = 31822336. Its totient is φ = 9074520.

The previous prime is 18166609. The next prime is 18166613. The reversal of 18166612 is 21666181.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18166613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5287 + ... + 8017.

Almost surely, 2^18166612 is an apocalyptic number.

It is an amenable number.

18166612 is a deficient number, since it is larger than the sum of its proper divisors (13655724).

18166612 is a wasteful number, since it uses less digits than its factorization.

18166612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398 (or 4396 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 18166612 is about 4262.2308712692. The cubic root of 18166612 is about 262.8802627855.

The spelling of 18166612 in words is "eighteen million, one hundred sixty-six thousand, six hundred twelve".