6644445 has 8 divisors (see below), whose sum is σ = 10631136. Its totient is φ = 3543696.

The previous prime is 6644441. The next prime is 6644459. The reversal of 6644445 is 5444466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6644445 - 2² = 6644441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221467 + ... + 221496.

It is an arithmetic number, because the mean of its divisors is an integer number (1328892).

Almost surely, 2^6644445 is an apocalyptic number.

It is an amenable number.

6644445 is a deficient number, since it is larger than the sum of its proper divisors (3986691).

6644445 is a wasteful number, since it uses less digits than its factorization.

6644445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442971.

The product of its digits is 46080, while the sum is 33.

The square root of 6644445 is about 2577.6820983201. The cubic root of 6644445 is about 187.9978591125.

The spelling of 6644445 in words is "six million, six hundred forty-four thousand, four hundred forty-five".