18164661 has 8 divisors (see below), whose sum is σ = 24244704. Its totient is φ = 12097200.

The previous prime is 18164651. The next prime is 18164689. The reversal of 18164661 is 16646181.

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

It is not a de Polignac number, because 18164661 - 2⁹ = 18164149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18164651) 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 7 ways as a sum of consecutive naturals, for example, 1011 + ... + 6111.

It is an arithmetic number, because the mean of its divisors is an integer number (3030588).

Almost surely, 2^18164661 is an apocalyptic number.

It is an amenable number.

18164661 is a deficient number, since it is larger than the sum of its proper divisors (6080043).

18164661 is a wasteful number, since it uses less digits than its factorization.

18164661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6291.

The product of its digits is 6912, while the sum is 33.

The square root of 18164661 is about 4262.0019943684. The cubic root of 18164661 is about 262.8708517892.

The spelling of 18164661 in words is "eighteen million, one hundred sixty-four thousand, six hundred sixty-one".