6645244 has 6 divisors (see below), whose sum is σ = 11629184. Its totient is φ = 3322620.

The previous prime is 6645227. The next prime is 6645259. The reversal of 6645244 is 4425466.

6645244 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830652 + ... + 830659.

Almost surely, 2^6645244 is an apocalyptic number.

It is an amenable number.

6645244 is a deficient number, since it is larger than the sum of its proper divisors (4983940).

6645244 is a wasteful number, since it uses less digits than its factorization.

6645244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661315 (or 1661313 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 6645244 is about 2577.8370778620. The cubic root of 6645244 is about 188.0053944431.

It can be divided in two parts, 6645 and 244, that added together give a square (6889 = 83²).

The spelling of 6645244 in words is "six million, six hundred forty-five thousand, two hundred forty-four".