18366166 has 16 divisors (see below), whose sum is σ = 33907104. Its totient is φ = 7265664.

The previous prime is 18366133. The next prime is 18366233. The reversal of 18366166 is 66166381.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 50275 + ... + 50638.

It is an arithmetic number, because the mean of its divisors is an integer number (2119194).

Almost surely, 2^18366166 is an apocalyptic number.

18366166 is a deficient number, since it is larger than the sum of its proper divisors (15540938).

18366166 is a wasteful number, since it uses less digits than its factorization.

18366166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100935.

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

The square root of 18366166 is about 4285.5765073091. The cubic root of 18366166 is about 263.8393095423.

The spelling of 18366166 in words is "eighteen million, three hundred sixty-six thousand, one hundred sixty-six".