6563260664 has 8 divisors (see below), whose sum is σ = 12306113760. Its totient is φ = 3281630328.

The previous prime is 6563260663. The next prime is 6563260721. The reversal of 6563260664 is 4660623656.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6563260663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410203784 + ... + 410203799.

It is an arithmetic number, because the mean of its divisors is an integer number (1538264220).

Almost surely, 2^6563260664 is an apocalyptic number.

It is an amenable number.

6563260664 is a deficient number, since it is larger than the sum of its proper divisors (5742853096).

6563260664 is a wasteful number, since it uses less digits than its factorization.

6563260664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820407589 (or 820407585 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 44.

The square root of 6563260664 is about 81013.9535141941. The cubic root of 6563260664 is about 1872.2904307163.

The spelling of 6563260664 in words is "six billion, five hundred sixty-three million, two hundred sixty thousand, six hundred sixty-four".