166657435013 has 2 divisors, whose sum is σ = 166657435014. Its totient is φ = 166657435012.

The previous prime is 166657435003. The next prime is 166657435019. The reversal of 166657435013 is 310534756661.

166657435013 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., 165589583329 + 1067851684 = 406927^2 + 32678^2 .

It is a cyclic number.

It is not a de Polignac number, because 166657435013 - 2²⁰ = 166656386437 is a prime.

It is a super-2 number, since 2×166657435013² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166657435019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83328717506 + 83328717507.

It is an arithmetic number, because the mean of its divisors is an integer number (83328717507).

Almost surely, 2^166657435013 is an apocalyptic number.

It is an amenable number.

166657435013 is a deficient number, since it is larger than the sum of its proper divisors (1).

166657435013 is an equidigital number, since it uses as much as digits as its factorization.

166657435013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 166657435013 in words is "one hundred sixty-six billion, six hundred fifty-seven million, four hundred thirty-five thousand, thirteen".