18272666 has 16 divisors (see below), whose sum is σ = 27941760. Its totient is φ = 8960640.

The previous prime is 18272659. The next prime is 18272669. The reversal of 18272666 is 66627281.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18272669) 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, 25055 + ... + 25773.

It is an arithmetic number, because the mean of its divisors is an integer number (1746360).

Almost surely, 2^18272666 is an apocalyptic number.

18272666 is a deficient number, since it is larger than the sum of its proper divisors (9669094).

18272666 is a wasteful number, since it uses less digits than its factorization.

18272666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949.

The product of its digits is 48384, while the sum is 38.

The square root of 18272666 is about 4274.6539041190. The cubic root of 18272666 is about 263.3908226066.

The spelling of 18272666 in words is "eighteen million, two hundred seventy-two thousand, six hundred sixty-six".