6559999555 has 8 divisors (see below), whose sum is σ = 7912788192. Its totient is φ = 5220807168.

The previous prime is 6559999553. The next prime is 6559999571. The reversal of 6559999555 is 5559999556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6559999555 - 2¹ = 6559999553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6559999553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3397999 + ... + 3399928.

It is an arithmetic number, because the mean of its divisors is an integer number (989098524).

Almost surely, 2^6559999555 is an apocalyptic number.

6559999555 is a deficient number, since it is larger than the sum of its proper divisors (1352788637).

6559999555 is a wasteful number, since it uses less digits than its factorization.

6559999555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6798125.

The product of its digits is 123018750, while the sum is 67.

The square root of 6559999555 is about 80993.8241781434. The cubic root of 6559999555 is about 1871.9802822994.

Subtracting from 6559999555 its reverse (5559999556), we obtain a palindrome (999999999).

The spelling of 6559999555 in words is "six billion, five hundred fifty-nine million, nine hundred ninety-nine thousand, five hundred fifty-five".