18335166689 has 16 divisors (see below), whose sum is σ = 22415839488. Its totient is φ = 14638897152.

The previous prime is 18335166653. The next prime is 18335166697. The reversal of 18335166689 is 98666153381.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18335166689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18335166089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782669 + ... + 805754.

It is an arithmetic number, because the mean of its divisors is an integer number (1400989968).

Almost surely, 2^18335166689 is an apocalyptic number.

It is an amenable number.

18335166689 is a deficient number, since it is larger than the sum of its proper divisors (4080672799).

18335166689 is a wasteful number, since it uses less digits than its factorization.

18335166689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588544.

The product of its digits is 5598720, while the sum is 56.

The spelling of 18335166689 in words is "eighteen billion, three hundred thirty-five million, one hundred sixty-six thousand, six hundred eighty-nine".