166579907807 has 2 divisors, whose sum is σ = 166579907808. Its totient is φ = 166579907806.

The previous prime is 166579907777. The next prime is 166579907833. The reversal of 166579907807 is 708709975661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166579907807 - 2¹⁰ = 166579906783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166579957807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83289953903 + 83289953904.

It is an arithmetic number, because the mean of its divisors is an integer number (83289953904).

Almost surely, 2^166579907807 is an apocalyptic number.

166579907807 is a deficient number, since it is larger than the sum of its proper divisors (1).

166579907807 is an equidigital number, since it uses as much as digits as its factorization.

166579907807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40007520, while the sum is 65.

The spelling of 166579907807 in words is "one hundred sixty-six billion, five hundred seventy-nine million, nine hundred seven thousand, eight hundred seven".