6643448 has 16 divisors (see below), whose sum is σ = 14236080. Its totient is φ = 2847168.

The previous prime is 6643423. The next prime is 6643453. The reversal of 6643448 is 8443466.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59261 + ... + 59372.

It is an arithmetic number, because the mean of its divisors is an integer number (889755).

Almost surely, 2^6643448 is an apocalyptic number.

It is an amenable number.

6643448 is an abundant number, since it is smaller than the sum of its proper divisors (7592632).

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

6643448 is a wasteful number, since it uses less digits than its factorization.

6643448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118646 (or 118642 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The square root of 6643448 is about 2577.4887002662. The cubic root of 6643448 is about 187.9884556062.

The spelling of 6643448 in words is "six million, six hundred forty-three thousand, four hundred forty-eight".