18412666 has 8 divisors (see below), whose sum is σ = 29243700. Its totient is φ = 8664768.

The previous prime is 18412657. The next prime is 18412679. The reversal of 18412666 is 66621481.

It can be written as a sum of positive squares in 2 ways, for example, as 15437041 + 2975625 = 3929^2 + 1725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 541549 = 18412666 / (1 + 8 + 4 + 1 + 2 + 6 + 6 + 6).

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 3 ways as a sum of consecutive naturals, for example, 270741 + ... + 270808.

Almost surely, 2^18412666 is an apocalyptic number.

18412666 is a deficient number, since it is larger than the sum of its proper divisors (10831034).

18412666 is a wasteful number, since it uses less digits than its factorization.

18412666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541568.

The product of its digits is 13824, while the sum is 34.

The square root of 18412666 is about 4290.9982521553. The cubic root of 18412666 is about 264.0617872674.

The spelling of 18412666 in words is "eighteen million, four hundred twelve thousand, six hundred sixty-six".