166652317813 has 2 divisors, whose sum is σ = 166652317814. Its totient is φ = 166652317812.

The previous prime is 166652317729. The next prime is 166652317829. The reversal of 166652317813 is 318713256661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135230501169 + 31421816644 = 367737^2 + 177262^2 .

It is an emirp because it is prime and its reverse (318713256661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166652317813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166652317883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83326158906 + 83326158907.

It is an arithmetic number, because the mean of its divisors is an integer number (83326158907).

Almost surely, 2^166652317813 is an apocalyptic number.

It is an amenable number.

166652317813 is a deficient number, since it is larger than the sum of its proper divisors (1).

166652317813 is an equidigital number, since it uses as much as digits as its factorization.

166652317813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The spelling of 166652317813 in words is "one hundred sixty-six billion, six hundred fifty-two million, three hundred seventeen thousand, eight hundred thirteen".