18166366 has 16 divisors (see below), whose sum is σ = 28800000. Its totient is φ = 8576568.

The previous prime is 18166307. The next prime is 18166373. The reversal of 18166366 is 66366181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1135 + ... + 6133.

It is an arithmetic number, because the mean of its divisors is an integer number (1800000).

Almost surely, 2^18166366 is an apocalyptic number.

18166366 is a deficient number, since it is larger than the sum of its proper divisors (10633634).

18166366 is a wasteful number, since it uses less digits than its factorization.

18166366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103.

The product of its digits is 31104, while the sum is 37.

The square root of 18166366 is about 4262.2020130444. The cubic root of 18166366 is about 262.8790761977.

The spelling of 18166366 in words is "eighteen million, one hundred sixty-six thousand, three hundred sixty-six".