5660512591 has 4 divisors (see below), whose sum is σ = 5660663400. Its totient is φ = 5660361784.

The previous prime is 5660512577. The next prime is 5660512597. The reversal of 5660512591 is 1952150665.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1952150665 = 5 ⋅390430133.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5660512591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5660512597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30165 + ... + 110593.

It is an arithmetic number, because the mean of its divisors is an integer number (1415165850).

Almost surely, 2^5660512591 is an apocalyptic number.

5660512591 is a deficient number, since it is larger than the sum of its proper divisors (150809).

5660512591 is an equidigital number, since it uses as much as digits as its factorization.

5660512591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150808.

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 5660512591 is about 75236.3781092631. The cubic root of 5660512591 is about 1782.1814552991.

It can be divided in two parts, 56605 and 12591, that added together give a palindrome (69196).

The spelling of 5660512591 in words is "five billion, six hundred sixty million, five hundred twelve thousand, five hundred ninety-one".