166690979018359 has 2 divisors, whose sum is σ = 166690979018360. Its totient is φ = 166690979018358.

The previous prime is 166690979018353. The next prime is 166690979018381. The reversal of 166690979018359 is 953810979096661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166690979018359 - 2¹¹ = 166690979016311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166690979018353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83345489509179 + 83345489509180.

It is an arithmetic number, because the mean of its divisors is an integer number (83345489509180).

Almost surely, 2^{166690979018359} is an apocalyptic number.

166690979018359 is a deficient number, since it is larger than the sum of its proper divisors (1).

166690979018359 is an equidigital number, since it uses as much as digits as its factorization.

166690979018359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1190427840, while the sum is 79.

The spelling of 166690979018359 in words is "one hundred sixty-six trillion, six hundred ninety billion, nine hundred seventy-nine million, eighteen thousand, three hundred fifty-nine".