6561007 has 2 divisors, whose sum is σ = 6561008. Its totient is φ = 6561006.

The previous prime is 6561001. The next prime is 6561011. The reversal of 6561007 is 7001656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6561007 - 2³ = 6560999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6561001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280503 + 3280504.

It is an arithmetic number, because the mean of its divisors is an integer number (3280504).

Almost surely, 2^6561007 is an apocalyptic number.

6561007 is a deficient number, since it is larger than the sum of its proper divisors (1).

6561007 is an equidigital number, since it uses as much as digits as its factorization.

6561007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 6561007 is about 2561.4462711523. The cubic root of 6561007 is about 187.2076106525.

The spelling of 6561007 in words is "six million, five hundred sixty-one thousand, seven".