18407066 has 8 divisors (see below), whose sum is σ = 27637524. Its totient is φ = 9194560.

The previous prime is 18407041. The next prime is 18407071. The reversal of 18407066 is 66070481.

It can be written as a sum of positive squares in 2 ways, for example, as 13213225 + 5193841 = 3635^2 + 2279^2 .

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

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, 1535 + ... + 6258.

Almost surely, 2^18407066 is an apocalyptic number.

18407066 is a deficient number, since it is larger than the sum of its proper divisors (9230458).

18407066 is a wasteful number, since it uses less digits than its factorization.

18407066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8976.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 18407066 is about 4290.3456737191. The cubic root of 18407066 is about 264.0350141040.

The spelling of 18407066 in words is "eighteen million, four hundred seven thousand, sixty-six".