166666851713 has 2 divisors, whose sum is σ = 166666851714. Its totient is φ = 166666851712.

The previous prime is 166666851707. The next prime is 166666851721. The reversal of 166666851713 is 317158666661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94269263089 + 72397588624 = 307033^2 + 269068^2 .

It is a cyclic number.

It is not a de Polignac number, because 166666851713 - 2¹⁶ = 166666786177 is a prime.

It is not a weakly prime, because it can be changed into another prime (166666851733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83333425856 + 83333425857.

It is an arithmetic number, because the mean of its divisors is an integer number (83333425857).

Almost surely, 2^166666851713 is an apocalyptic number.

It is an amenable number.

166666851713 is a deficient number, since it is larger than the sum of its proper divisors (1).

166666851713 is an equidigital number, since it uses as much as digits as its factorization.

166666851713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The spelling of 166666851713 in words is "one hundred sixty-six billion, six hundred sixty-six million, eight hundred fifty-one thousand, seven hundred thirteen".