66871710179 has 2 divisors, whose sum is σ = 66871710180. Its totient is φ = 66871710178.

The previous prime is 66871710163. The next prime is 66871710197. The reversal of 66871710179 is 97101717866.

It is a happy number.

Together with next prime (66871710197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66871710179 - 2⁴ = 66871710163 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66871710179.

It is not a weakly prime, because it can be changed into another prime (66871710379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33435855089 + 33435855090.

It is an arithmetic number, because the mean of its divisors is an integer number (33435855090).

Almost surely, 2^66871710179 is an apocalyptic number.

66871710179 is a deficient number, since it is larger than the sum of its proper divisors (1).

66871710179 is an equidigital number, since it uses as much as digits as its factorization.

66871710179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 53.

The spelling of 66871710179 in words is "sixty-six billion, eight hundred seventy-one million, seven hundred ten thousand, one hundred seventy-nine".