6599561 has 2 divisors, whose sum is σ = 6599562. Its totient is φ = 6599560.

The previous prime is 6599557. The next prime is 6599569. The reversal of 6599561 is 1659956.

6599561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6405961 + 193600 = 2531^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 6599561 - 2² = 6599557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6599569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3299780 + 3299781.

It is an arithmetic number, because the mean of its divisors is an integer number (3299781).

Almost surely, 2^6599561 is an apocalyptic number.

It is an amenable number.

6599561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6599561 is an equidigital number, since it uses as much as digits as its factorization.

6599561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72900, while the sum is 41.

The square root of 6599561 is about 2568.9610740531. The cubic root of 6599561 is about 187.5735865238.

The spelling of 6599561 in words is "six million, five hundred ninety-nine thousand, five hundred sixty-one".