16660217762659 has 8 divisors (see below), whose sum is σ = 17463461388912. Its totient is φ = 15875873986560.

The previous prime is 16660217762653. The next prime is 16660217762677. The reversal of 16660217762659 is 95626771206661.

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 16660217762659 - 2³ = 16660217762651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16660217762659.

It is not an unprimeable number, because it can be changed into a prime (16660217762651) 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, 4724960734 + ... + 4724964259.

It is an arithmetic number, because the mean of its divisors is an integer number (2182932673614).

Almost surely, 2^{16660217762659} is an apocalyptic number.

16660217762659 is a deficient number, since it is larger than the sum of its proper divisors (803243626253).

16660217762659 is an equidigital number, since it uses as much as digits as its factorization.

16660217762659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9449925077.

The product of its (nonzero) digits is 68584320, while the sum is 64.

The spelling of 16660217762659 in words is "sixteen trillion, six hundred sixty billion, two hundred seventeen million, seven hundred sixty-two thousand, six hundred fifty-nine".