6648663 has 24 divisors (see below), whose sum is σ = 10652160. Its totient is φ = 3674160.

The previous prime is 6648661. The next prime is 6648701. The reversal of 6648663 is 3668466.

It is not a de Polignac number, because 6648663 - 2¹ = 6648661 is a prime.

It is the 2579-th Hogben number.

6648663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6648661) by changing a digit.

It is a nontrivial repunit in base 2578.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3828 + ... + 5286.

It is an arithmetic number, because the mean of its divisors is an integer number (443840).

Almost surely, 2^6648663 is an apocalyptic number.

6648663 is a deficient number, since it is larger than the sum of its proper divisors (4003497).

6648663 is a wasteful number, since it uses less digits than its factorization.

6648663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507 (or 1500 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 6648663 is about 2578.5001454334. The cubic root of 6648663 is about 188.0376320472.

The spelling of 6648663 in words is "six million, six hundred forty-eight thousand, six hundred sixty-three".