66396575227 has 2 divisors, whose sum is σ = 66396575228. Its totient is φ = 66396575226.

The previous prime is 66396575177. The next prime is 66396575257. The reversal of 66396575227 is 72257569366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66396575227 - 2³⁵ = 32036836859 is a prime.

It is not a weakly prime, because it can be changed into another prime (66396575257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33198287613 + 33198287614.

It is an arithmetic number, because the mean of its divisors is an integer number (33198287614).

Almost surely, 2^66396575227 is an apocalyptic number.

66396575227 is a deficient number, since it is larger than the sum of its proper divisors (1).

66396575227 is an equidigital number, since it uses as much as digits as its factorization.

66396575227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 58.

The spelling of 66396575227 in words is "sixty-six billion, three hundred ninety-six million, five hundred seventy-five thousand, two hundred twenty-seven".