6564791 has 4 divisors (see below), whose sum is σ = 6609000. Its totient is φ = 6520584.

The previous prime is 6564781. The next prime is 6564793. The reversal of 6564791 is 1974656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6564791 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 (6564793) 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 in 3 ways as a sum of consecutive naturals, for example, 21881 + ... + 22178.

It is an arithmetic number, because the mean of its divisors is an integer number (1652250).

Almost surely, 2^6564791 is an apocalyptic number.

6564791 is a deficient number, since it is larger than the sum of its proper divisors (44209).

6564791 is a wasteful number, since it uses less digits than its factorization.

6564791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44208.

The product of its digits is 45360, while the sum is 38.

The square root of 6564791 is about 2562.1848098839. The cubic root of 6564791 is about 187.2435938208.

The spelling of 6564791 in words is "six million, five hundred sixty-four thousand, seven hundred ninety-one".