6563805663 has 8 divisors (see below), whose sum is σ = 8810478000. Its totient is φ = 4346501888.

The previous prime is 6563805653. The next prime is 6563805719. The reversal of 6563805663 is 3665083656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6563805663 - 2¹⁴ = 6563789279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6563805623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7341618 + ... + 7342511.

It is an arithmetic number, because the mean of its divisors is an integer number (1101309750).

Almost surely, 2^6563805663 is an apocalyptic number.

6563805663 is a deficient number, since it is larger than the sum of its proper divisors (2246672337).

6563805663 is a wasteful number, since it uses less digits than its factorization.

6563805663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14684281.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The square root of 6563805663 is about 81017.3170562936. The cubic root of 6563805663 is about 1872.3422529341.

The spelling of 6563805663 in words is "six billion, five hundred sixty-three million, eight hundred five thousand, six hundred sixty-three".