6563664 has 60 divisors (see below), whose sum is σ = 19344000. Its totient is φ = 2071872.

The previous prime is 6563663. The next prime is 6563677. The reversal of 6563664 is 4663656.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6563663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1537 + ... + 3935.

It is an arithmetic number, because the mean of its divisors is an integer number (322400).

Almost surely, 2^6563664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6563664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9672000).

6563664 is an abundant number, since it is smaller than the sum of its proper divisors (12780336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6563664 is a wasteful number, since it uses less digits than its factorization.

6563664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432 (or 2423 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 6563664 is about 2561.9648709535. The cubic root of 6563664 is about 187.2328782927.

It can be divided in two parts, 6563 and 664, that added together give a palindrome (7227).

The spelling of 6563664 in words is "six million, five hundred sixty-three thousand, six hundred sixty-four".