6456566 has 16 divisors (see below), whose sum is σ = 10450944. Its totient is φ = 2980224.

The previous prime is 6456563. The next prime is 6456577. The reversal of 6456566 is 6656546.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6456563) 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 7 ways as a sum of consecutive naturals, for example, 11 + ... + 3593.

It is an arithmetic number, because the mean of its divisors is an integer number (653184).

Almost surely, 2^6456566 is an apocalyptic number.

6456566 is a deficient number, since it is larger than the sum of its proper divisors (3994378).

6456566 is a wasteful number, since it uses less digits than its factorization.

6456566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655.

The product of its digits is 129600, while the sum is 38.

The square root of 6456566 is about 2540.9773710130. The cubic root of 6456566 is about 186.2089415973.

It can be divided in two parts, 645656 and 6, that multiplied together give a triangular number (3873936 = T₂₇₈₃).

The spelling of 6456566 in words is "six million, four hundred fifty-six thousand, five hundred sixty-six".