18666895717 has 8 divisors (see below), whose sum is σ = 19033394400. Its totient is φ = 18302067504.

The previous prime is 18666895693. The next prime is 18666895727. The reversal of 18666895717 is 71759866681.

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

It is a cyclic number.

It is not a de Polignac number, because 18666895717 - 2⁷ = 18666895589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18666895727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395038 + ... + 439759.

It is an arithmetic number, because the mean of its divisors is an integer number (2379174300).

Almost surely, 2^18666895717 is an apocalyptic number.

It is an amenable number.

18666895717 is a deficient number, since it is larger than the sum of its proper divisors (366498683).

18666895717 is an equidigital number, since it uses as much as digits as its factorization.

18666895717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835235.

The product of its digits is 30481920, while the sum is 64.

The spelling of 18666895717 in words is "eighteen billion, six hundred sixty-six million, eight hundred ninety-five thousand, seven hundred seventeen".