18608661 has 12 divisors (see below), whose sum is σ = 27031680. Its totient is φ = 12335400.

The previous prime is 18608627. The next prime is 18608717. The reversal of 18608661 is 16680681.

It is not a de Polignac number, because 18608661 - 2⁷ = 18608533 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18608561) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4165 + ... + 7386.

It is an arithmetic number, because the mean of its divisors is an integer number (2252640).

Almost surely, 2^18608661 is an apocalyptic number.

It is an amenable number.

18608661 is a deficient number, since it is larger than the sum of its proper divisors (8423019).

18608661 is a wasteful number, since it uses less digits than its factorization.

18608661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11736 (or 11733 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18608661 is about 4313.7757243510. The cubic root of 18608661 is about 264.9954241526.

It can be divided in two parts, 1860866 and 1, that added together give a cube (1860867 = 123³).

The spelling of 18608661 in words is "eighteen million, six hundred eight thousand, six hundred sixty-one".