166717183871149 has 2 divisors, whose sum is σ = 166717183871150. Its totient is φ = 166717183871148.

The previous prime is 166717183871053. The next prime is 166717183871171. The reversal of 166717183871149 is 941178381717661.

166717183871149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155887885047049 + 10829298824100 = 12485507^2 + 3290790^2 .

It is a cyclic number.

It is not a de Polignac number, because 166717183871149 - 2²¹ = 166717181773997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166717183871449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83358591935574 + 83358591935575.

It is an arithmetic number, because the mean of its divisors is an integer number (83358591935575).

Almost surely, 2^{166717183871149} is an apocalyptic number.

It is an amenable number.

166717183871149 is a deficient number, since it is larger than the sum of its proper divisors (1).

166717183871149 is an equidigital number, since it uses as much as digits as its factorization.

166717183871149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85349376, while the sum is 70.

The spelling of 166717183871149 in words is "one hundred sixty-six trillion, seven hundred seventeen billion, one hundred eighty-three million, eight hundred seventy-one thousand, one hundred forty-nine".