6666598559 has 2 divisors, whose sum is σ = 6666598560. Its totient is φ = 6666598558.

The previous prime is 6666598447. The next prime is 6666598567. The reversal of 6666598559 is 9558956666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6666598559 - 2¹² = 6666594463 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6666598495 and 6666598504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666598579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333299279 + 3333299280.

It is an arithmetic number, because the mean of its divisors is an integer number (3333299280).

Almost surely, 2^6666598559 is an apocalyptic number.

6666598559 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666598559 is an equidigital number, since it uses as much as digits as its factorization.

6666598559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976000, while the sum is 65.

The square root of 6666598559 is about 81649.2410191301. The cubic root of 6666598559 is about 1882.0656485634.

The spelling of 6666598559 in words is "six billion, six hundred sixty-six million, five hundred ninety-eight thousand, five hundred fifty-nine".