6644444 has 6 divisors (see below), whose sum is σ = 11627784. Its totient is φ = 3322220.

The previous prime is 6644441. The next prime is 6644459. The reversal of 6644444 is 4444466.

6644444 is a modest number, since divided by 4444 gives 664 as remainder.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6644444.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 830552 + ... + 830559.

It is an arithmetic number, because the mean of its divisors is an integer number (1937964).

Almost surely, 2^6644444 is an apocalyptic number.

It is an amenable number.

6644444 is a deficient number, since it is larger than the sum of its proper divisors (4983340).

6644444 is a wasteful number, since it uses less digits than its factorization.

6644444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661115 (or 1661113 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

The square root of 6644444 is about 2577.6819043474. The cubic root of 6644444 is about 187.9978496812.

The spelling of 6644444 in words is "six million, six hundred forty-four thousand, four hundred forty-four".