166870366679 has 2 divisors, whose sum is σ = 166870366680. Its totient is φ = 166870366678.

The previous prime is 166870366673. The next prime is 166870366693. The reversal of 166870366679 is 976663078661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166870366679 - 2⁸ = 166870366423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166870366673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83435183339 + 83435183340.

It is an arithmetic number, because the mean of its divisors is an integer number (83435183340).

Almost surely, 2^166870366679 is an apocalyptic number.

166870366679 is a deficient number, since it is larger than the sum of its proper divisors (1).

166870366679 is an equidigital number, since it uses as much as digits as its factorization.

166870366679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82301184, while the sum is 65.

The spelling of 166870366679 in words is "one hundred sixty-six billion, eight hundred seventy million, three hundred sixty-six thousand, six hundred seventy-nine".