6559559557 has 2 divisors, whose sum is σ = 6559559558. Its totient is φ = 6559559556.

The previous prime is 6559559527. The next prime is 6559559581. The reversal of 6559559557 is 7559559556.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3345349921 + 3214209636 = 57839^2 + 56694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6559559557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6559559495 and 6559559504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6559559507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3279779778 + 3279779779.

It is an arithmetic number, because the mean of its divisors is an integer number (3279779779).

Almost surely, 2^6559559557 is an apocalyptic number.

It is an amenable number.

6559559557 is a deficient number, since it is larger than the sum of its proper divisors (1).

6559559557 is an equidigital number, since it uses as much as digits as its factorization.

6559559557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53156250, while the sum is 61.

The square root of 6559559557 is about 80991.1078884590. The cubic root of 6559559557 is about 1871.9384283333.

Subtracting 6559559557 from its reverse (7559559556), we obtain a palindrome (999999999).

The spelling of 6559559557 in words is "six billion, five hundred fifty-nine million, five hundred fifty-nine thousand, five hundred fifty-seven".