166717183871053 has 2 divisors, whose sum is σ = 166717183871054. Its totient is φ = 166717183871052.

The previous prime is 166717183871039. The next prime is 166717183871149. The reversal of 166717183871053 is 350178381717661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166575083521609 + 142100349444 = 12906397^2 + 376962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166717183871053 is a prime.

It is a super-2 number, since 2×166717183871053² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166717183871003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83358591935526 + 83358591935527.

It is an arithmetic number, because the mean of its divisors is an integer number (83358591935527).

Almost surely, 2^{166717183871053} is an apocalyptic number.

It is an amenable number.

166717183871053 is a deficient number, since it is larger than the sum of its proper divisors (1).

166717183871053 is an equidigital number, since it uses as much as digits as its factorization.

166717183871053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35562240, while the sum is 64.

The spelling of 166717183871053 in words is "one hundred sixty-six trillion, seven hundred seventeen billion, one hundred eighty-three million, eight hundred seventy-one thousand, fifty-three".