6560999 has 2 divisors, whose sum is σ = 6561000. Its totient is φ = 6560998.

The previous prime is 6560993. The next prime is 6561001. The reversal of 6560999 is 9990656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6560999 is a prime.

Together with 6561001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6560993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280499 + 3280500.

It is an arithmetic number, because the mean of its divisors is an integer number (3280500).

Almost surely, 2^6560999 is an apocalyptic number.

6560999 is a deficient number, since it is larger than the sum of its proper divisors (1).

6560999 is an equidigital number, since it uses as much as digits as its factorization.

6560999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 6560999 is about 2561.4447095341. Note that the first 3 decimals coincide. The cubic root of 6560999 is about 187.2075345635.

The spelling of 6560999 in words is "six million, five hundred sixty thousand, nine hundred ninety-nine".