18336666137779 has 16 divisors (see below), whose sum is σ = 20486222542080. Its totient is φ = 16272190060000.

The previous prime is 18336666137729. The next prime is 18336666137809. The reversal of 18336666137779 is 97773166663381.

It is a cyclic number.

It is not a de Polignac number, because 18336666137779 - 2⁷ = 18336666137651 is a prime.

It is a super-2 number, since 2×18336666137779² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18336666137729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116151049 + ... + 116308810.

It is an arithmetic number, because the mean of its divisors is an integer number (1280388908880).

Almost surely, 2^{18336666137779} is an apocalyptic number.

18336666137779 is a deficient number, since it is larger than the sum of its proper divisors (2149556404301).

18336666137779 is a wasteful number, since it uses less digits than its factorization.

18336666137779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232460042.

The product of its digits is 864162432, while the sum is 73.

The spelling of 18336666137779 in words is "eighteen trillion, three hundred thirty-six billion, six hundred sixty-six million, one hundred thirty-seven thousand, seven hundred seventy-nine".