6559779547 has 2 divisors, whose sum is σ = 6559779548. Its totient is φ = 6559779546.

The previous prime is 6559779533. The next prime is 6559779571. The reversal of 6559779547 is 7459779556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6559779547 - 2²³ = 6551390939 is a prime.

It is not a weakly prime, because it can be changed into another prime (6559776547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3279889773 + 3279889774.

It is an arithmetic number, because the mean of its divisors is an integer number (3279889774).

Almost surely, 2^6559779547 is an apocalyptic number.

6559779547 is a deficient number, since it is larger than the sum of its proper divisors (1).

6559779547 is an equidigital number, since it uses as much as digits as its factorization.

6559779547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83349000, while the sum is 64.

The square root of 6559779547 is about 80992.4659891277. The cubic root of 6559779547 is about 1871.9593546942.

Subtracting 6559779547 from its reverse (7459779556), we obtain a palindrome (900000009).

The spelling of 6559779547 in words is "six billion, five hundred fifty-nine million, seven hundred seventy-nine thousand, five hundred forty-seven".