66560616731289 has 16 divisors (see below), whose sum is σ = 88904429602560. Its totient is φ = 44295276826320.

The previous prime is 66560616731267. The next prime is 66560616731291. The reversal of 66560616731289 is 98213761606566.

66560616731289 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 66560616731289 - 2¹¹ = 66560616729241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66560616739289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111092482 + ... + 111690020.

It is an arithmetic number, because the mean of its divisors is an integer number (5556526850160).

Almost surely, 2^{66560616731289} is an apocalyptic number.

It is an amenable number.

66560616731289 is a deficient number, since it is larger than the sum of its proper divisors (22343812871271).

66560616731289 is a wasteful number, since it uses less digits than its factorization.

66560616731289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663140.

The product of its (nonzero) digits is 117573120, while the sum is 66.

The spelling of 66560616731289 in words is "sixty-six trillion, five hundred sixty billion, six hundred sixteen million, seven hundred thirty-one thousand, two hundred eighty-nine".