166670591413 has 2 divisors, whose sum is σ = 166670591414. Its totient is φ = 166670591412.

The previous prime is 166670591407. The next prime is 166670591441. The reversal of 166670591413 is 314195076661.

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., 147672655524 + 18997935889 = 384282^2 + 137833^2 .

It is a cyclic number.

It is not a de Polignac number, because 166670591413 - 2²¹ = 166668494261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166670591443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83335295706 + 83335295707.

It is an arithmetic number, because the mean of its divisors is an integer number (83335295707).

Almost surely, 2^166670591413 is an apocalyptic number.

It is an amenable number.

166670591413 is a deficient number, since it is larger than the sum of its proper divisors (1).

166670591413 is an equidigital number, since it uses as much as digits as its factorization.

166670591413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 166670591413 in words is "one hundred sixty-six billion, six hundred seventy million, five hundred ninety-one thousand, four hundred thirteen".