6559866049 has 27 divisors (see below), whose sum is σ = 7448000931. Its totient is φ = 5773181040.

The previous prime is 6559866023. The next prime is 6559866077. The reversal of 6559866049 is 9406689556.

The square root of 6559866049 is 80993.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5869858225 + 690007824 = 76615^2 + 26268^2 .

It is not a de Polignac number, because 6559866049 - 2⁵ = 6559866017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6559865984 and 6559866002.

It is not an unprimeable number, because it can be changed into a prime (6559866349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 32964052 + ... + 32964250.

Almost surely, 2^6559866049 is an apocalyptic number.

6559866049 is the 80993-rd square number.

6559866049 is the 40497-th centered octagonal number.

It is an amenable number.

6559866049 is a deficient number, since it is larger than the sum of its proper divisors (888134882).

6559866049 is an equidigital number, since it uses as much as digits as its factorization.

6559866049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 58.

The cubic root of 6559866049 is about 1871.9675829949.

The spelling of 6559866049 in words is "six billion, five hundred fifty-nine million, eight hundred sixty-six thousand, forty-nine".