6560399 has 4 divisors (see below), whose sum is σ = 6565536. Its totient is φ = 6555264.

The previous prime is 6560371. The next prime is 6560413. The reversal of 6560399 is 9930656.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6560399 - 2⁸ = 6560143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6560299) 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 in 3 ways as a sum of consecutive naturals, for example, 1007 + ... + 3759.

It is an arithmetic number, because the mean of its divisors is an integer number (1641384).

Almost surely, 2^6560399 is an apocalyptic number.

6560399 is a deficient number, since it is larger than the sum of its proper divisors (5137).

6560399 is a wasteful number, since it uses less digits than its factorization.

6560399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5136.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 6560399 is about 2561.3275854525. The cubic root of 6560399 is about 187.2018277118.

The spelling of 6560399 in words is "six million, five hundred sixty thousand, three hundred ninety-nine".