66956885179 has 2 divisors, whose sum is σ = 66956885180. Its totient is φ = 66956885178.

The previous prime is 66956885147. The next prime is 66956885197. The reversal of 66956885179 is 97158865966.

Together with next prime (66956885197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66956885179 - 2⁵ = 66956885147 is a prime.

It is not a weakly prime, because it can be changed into another prime (66956855179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33478442589 + 33478442590.

It is an arithmetic number, because the mean of its divisors is an integer number (33478442590).

Almost surely, 2^66956885179 is an apocalyptic number.

66956885179 is a deficient number, since it is larger than the sum of its proper divisors (1).

66956885179 is an equidigital number, since it uses as much as digits as its factorization.

66956885179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 195955200, while the sum is 70.

The spelling of 66956885179 in words is "sixty-six billion, nine hundred fifty-six million, eight hundred eighty-five thousand, one hundred seventy-nine".