66560589831 has 16 divisors (see below), whose sum is σ = 91821900800. Its totient is φ = 42843116160.

The previous prime is 66560589829. The next prime is 66560589833. The reversal of 66560589831 is 13898506566.

It is an interprime number because it is at equal distance from previous prime (66560589829) and next prime (66560589833).

It is not a de Polignac number, because 66560589831 - 2¹ = 66560589829 is a prime.

It is a super-2 number, since 2×66560589831² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66560589833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786181 + ... + 866718.

It is an arithmetic number, because the mean of its divisors is an integer number (5738868800).

Almost surely, 2^66560589831 is an apocalyptic number.

66560589831 is a deficient number, since it is larger than the sum of its proper divisors (25261310969).

66560589831 is a wasteful number, since it uses less digits than its factorization.

66560589831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653366.

The product of its (nonzero) digits is 9331200, while the sum is 57.

The spelling of 66560589831 in words is "sixty-six billion, five hundred sixty million, five hundred eighty-nine thousand, eight hundred thirty-one".