66670647177 has 16 divisors (see below), whose sum is σ = 89641697600. Its totient is φ = 44074756800.

The previous prime is 66670647161. The next prime is 66670647187. The reversal of 66670647177 is 77174607666.

It is not a de Polignac number, because 66670647177 - 2⁴ = 66670647161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66670647137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13602 + ... + 365412.

It is an arithmetic number, because the mean of its divisors is an integer number (5602606100).

Almost surely, 2^66670647177 is an apocalyptic number.

It is an amenable number.

66670647177 is a deficient number, since it is larger than the sum of its proper divisors (22971050423).

66670647177 is a wasteful number, since it uses less digits than its factorization.

66670647177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352344.

The product of its (nonzero) digits is 12446784, while the sum is 57.

The spelling of 66670647177 in words is "sixty-six billion, six hundred seventy million, six hundred forty-seven thousand, one hundred seventy-seven".