66147322667 has 2 divisors, whose sum is σ = 66147322668. Its totient is φ = 66147322666.

The previous prime is 66147322607. The next prime is 66147322753. The reversal of 66147322667 is 76622374166.

66147322667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66147322667 - 2²⁰ = 66146274091 is a prime.

It is not a weakly prime, because it can be changed into another prime (66147322607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33073661333 + 33073661334.

It is an arithmetic number, because the mean of its divisors is an integer number (33073661334).

Almost surely, 2^66147322667 is an apocalyptic number.

66147322667 is a deficient number, since it is larger than the sum of its proper divisors (1).

66147322667 is an equidigital number, since it uses as much as digits as its factorization.

66147322667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 50.

The spelling of 66147322667 in words is "sixty-six billion, one hundred forty-seven million, three hundred twenty-two thousand, six hundred sixty-seven".