6563880 has 48 divisors (see below), whose sum is σ = 21333780. Its totient is φ = 1750272.

The previous prime is 6563867. The next prime is 6563929. The reversal of 6563880 is 883656.

It can be written as a sum of positive squares in 2 ways, for example, as 6563844 + 36 = 2562^2 + 6^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8757 + ... + 9476.

Almost surely, 2^6563880 is an apocalyptic number.

6563880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6563880 is an abundant number, since it is smaller than the sum of its proper divisors (14769900).

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

6563880 is a wasteful number, since it uses less digits than its factorization.

6563880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18250 (or 18243 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 6563880 is about 2562.0070257515. The cubic root of 6563880 is about 187.2349321180.

Subtracting from 6563880 its sum of digits (36), we obtain a square (6563844 = 2562²).

The spelling of 6563880 in words is "six million, five hundred sixty-three thousand, eight hundred eighty".