16560666313 has 8 divisors (see below), whose sum is σ = 16835652360. Its totient is φ = 16285793280.

The previous prime is 16560666257. The next prime is 16560666377. The reversal of 16560666313 is 31366606561.

It can be written as a sum of positive squares in 4 ways, for example, as 5212089 + 16555454224 = 2283^2 + 128668^2 .

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 16560666313 - 2¹⁷ = 16560535241 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 16560666313.

It is not an unprimeable number, because it can be changed into a prime (16560666013) 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, 298281 + ... + 349417.

It is an arithmetic number, because the mean of its divisors is an integer number (2104456545).

Almost surely, 2^16560666313 is an apocalyptic number.

It is an amenable number.

16560666313 is a deficient number, since it is larger than the sum of its proper divisors (274986047).

16560666313 is an equidigital number, since it uses as much as digits as its factorization.

16560666313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56507.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 16560666313 in words is "sixteen billion, five hundred sixty million, six hundred sixty-six thousand, three hundred thirteen".