166652317729 has 2 divisors, whose sum is σ = 166652317730. Its totient is φ = 166652317728.

The previous prime is 166652317703. The next prime is 166652317813. The reversal of 166652317729 is 927713256661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117598927329 + 49053390400 = 342927^2 + 221480^2 .

It is an emirp because it is prime and its reverse (927713256661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166652317729 - 2¹⁵ = 166652284961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166652317729.

It is not a weakly prime, because it can be changed into another prime (166652317129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83326158864 + 83326158865.

It is an arithmetic number, because the mean of its divisors is an integer number (83326158865).

Almost surely, 2^166652317729 is an apocalyptic number.

It is an amenable number.

166652317729 is a deficient number, since it is larger than the sum of its proper divisors (1).

166652317729 is an equidigital number, since it uses as much as digits as its factorization.

166652317729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 55.

The spelling of 166652317729 in words is "one hundred sixty-six billion, six hundred fifty-two million, three hundred seventeen thousand, seven hundred twenty-nine".