66564073227 has 16 divisors (see below), whose sum is σ = 89410597632. Its totient is φ = 44047264800.

The previous prime is 66564073211. The next prime is 66564073241. The reversal of 66564073227 is 72237046566.

It is not a de Polignac number, because 66564073227 - 2⁴ = 66564073211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66564073207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520948 + ... + 636014.

It is an arithmetic number, because the mean of its divisors is an integer number (5588162352).

Almost surely, 2^66564073227 is an apocalyptic number.

66564073227 is a deficient number, since it is larger than the sum of its proper divisors (22846524405).

66564073227 is a wasteful number, since it uses less digits than its factorization.

66564073227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116498.

The product of its (nonzero) digits is 2540160, while the sum is 48.

The spelling of 66564073227 in words is "sixty-six billion, five hundred sixty-four million, seventy-three thousand, two hundred twenty-seven".