18366668517 has 8 divisors (see below), whose sum is σ = 24635532096. Its totient is φ = 12171125312.

The previous prime is 18366668501. The next prime is 18366668519. The reversal of 18366668517 is 71586666381.

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 18366668517 - 2⁴ = 18366668501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366668519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18329508 + ... + 18330509.

It is an arithmetic number, because the mean of its divisors is an integer number (3079441512).

Almost surely, 2^18366668517 is an apocalyptic number.

It is an amenable number.

18366668517 is a deficient number, since it is larger than the sum of its proper divisors (6268863579).

18366668517 is a wasteful number, since it uses less digits than its factorization.

18366668517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36660187.

The product of its digits is 8709120, while the sum is 57.

The spelling of 18366668517 in words is "eighteen billion, three hundred sixty-six million, six hundred sixty-eight thousand, five hundred seventeen".