66564743297 has 16 divisors (see below), whose sum is σ = 72627313920. Its totient is φ = 60638378112.

The previous prime is 66564743293. The next prime is 66564743303. The reversal of 66564743297 is 79234746566.

66564743297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66564743297 - 2² = 66564743293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66564743291) 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, 978104 + ... + 1043942.

It is an arithmetic number, because the mean of its divisors is an integer number (4539207120).

Almost surely, 2^66564743297 is an apocalyptic number.

It is an amenable number.

66564743297 is a deficient number, since it is larger than the sum of its proper divisors (6062570623).

66564743297 is a wasteful number, since it uses less digits than its factorization.

66564743297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66872.

The product of its digits is 45722880, while the sum is 59.

The spelling of 66564743297 in words is "sixty-six billion, five hundred sixty-four million, seven hundred forty-three thousand, two hundred ninety-seven".