6559999557 has 8 divisors (see below), whose sum is σ = 8753822784. Its totient is φ = 4369754688.

The previous prime is 6559999553. The next prime is 6559999571. The reversal of 6559999557 is 7559999556.

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

It is not a de Polignac number, because 6559999557 - 2² = 6559999553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6559999491 and 6559999500.

It is a congruent 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, 890308 + ... + 897645.

It is an arithmetic number, because the mean of its divisors is an integer number (1094227848).

Almost surely, 2^6559999557 is an apocalyptic number.

It is an amenable number.

6559999557 is a deficient number, since it is larger than the sum of its proper divisors (2193823227).

6559999557 is a wasteful number, since it uses less digits than its factorization.

6559999557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789179.

The product of its digits is 172226250, while the sum is 69.

The square root of 6559999557 is about 80993.8241904900. The cubic root of 6559999557 is about 1871.9802824896.

Subtracting 6559999557 from its reverse (7559999556), we obtain a palindrome (999999999).

The spelling of 6559999557 in words is "six billion, five hundred fifty-nine million, nine hundred ninety-nine thousand, five hundred fifty-seven".