18075566 has 16 divisors (see below), whose sum is σ = 28032048. Its totient is φ = 8736000.

The previous prime is 18075557. The next prime is 18075569. The reversal of 18075566 is 66557081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18075569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7646 + ... + 9726.

It is an arithmetic number, because the mean of its divisors is an integer number (1752003).

Almost surely, 2^18075566 is an apocalyptic number.

18075566 is a deficient number, since it is larger than the sum of its proper divisors (9956482).

18075566 is a wasteful number, since it uses less digits than its factorization.

18075566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 18075566 is about 4251.5368985815. The cubic root of 18075566 is about 262.4403661966.

The spelling of 18075566 in words is "eighteen million, seventy-five thousand, five hundred sixty-six".