18625666 has 8 divisors (see below), whose sum is σ = 28095120. Its totient is φ = 9260628.

The previous prime is 18625661. The next prime is 18625667. The reversal of 18625666 is 66652681.

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

It is not an unprimeable number, because it can be changed into a prime (18625661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25656 + ... + 26371.

It is an arithmetic number, because the mean of its divisors is an integer number (3511890).

Almost surely, 2^18625666 is an apocalyptic number.

18625666 is a deficient number, since it is larger than the sum of its proper divisors (9469454).

18625666 is a wasteful number, since it uses less digits than its factorization.

18625666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52208.

The product of its digits is 103680, while the sum is 40.

The square root of 18625666 is about 4315.7462854065. The cubic root of 18625666 is about 265.0761191087.

It can be divided in two parts, 18625 and 666, that added together give a palindrome (19291).

The spelling of 18625666 in words is "eighteen million, six hundred twenty-five thousand, six hundred sixty-six".