6444656 has 20 divisors (see below), whose sum is σ = 12557232. Its totient is φ = 3204096.

The previous prime is 6444653. The next prime is 6444671. The reversal of 6444656 is 6564446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045 + ... + 4131.

Almost surely, 2^6444656 is an apocalyptic number.

It is an amenable number.

6444656 is a deficient number, since it is larger than the sum of its proper divisors (6112576).

6444656 is a wasteful number, since it uses less digits than its factorization.

6444656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288 (or 2282 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 6444656 is about 2538.6327028540. The cubic root of 6444656 is about 186.0943753538.

The spelling of 6444656 in words is "six million, four hundred forty-four thousand, six hundred fifty-six".