166851760013 has 2 divisors, whose sum is σ = 166851760014. Its totient is φ = 166851760012.

The previous prime is 166851759959. The next prime is 166851760067. The reversal of 166851760013 is 310067158661.

It is a balanced prime because it is at equal distance from previous prime (166851759959) and next prime (166851760067).

It can be written as a sum of positive squares in only one way, i.e., 106014057604 + 60837702409 = 325598^2 + 246653^2 .

It is a cyclic number.

It is not a de Polignac number, because 166851760013 - 2¹⁰ = 166851758989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166851760213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83425880006 + 83425880007.

It is an arithmetic number, because the mean of its divisors is an integer number (83425880007).

Almost surely, 2^166851760013 is an apocalyptic number.

It is an amenable number.

166851760013 is a deficient number, since it is larger than the sum of its proper divisors (1).

166851760013 is an equidigital number, since it uses as much as digits as its factorization.

166851760013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 166851760013 in words is "one hundred sixty-six billion, eight hundred fifty-one million, seven hundred sixty thousand, thirteen".