6644043 has 24 divisors (see below), whose sum is σ = 11052288. Its totient is φ = 3767472.

The previous prime is 6644023. The next prime is 6644047. The reversal of 6644043 is 3404466.

It is a happy number.

It is not a de Polignac number, because 6644043 - 2¹⁰ = 6643019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6643998 and 6644016.

It is not an unprimeable number, because it can be changed into a prime (6644047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9946 + ... + 10592.

It is an arithmetic number, because the mean of its divisors is an integer number (460512).

Almost surely, 2^6644043 is an apocalyptic number.

6644043 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6644043 is a deficient number, since it is larger than the sum of its proper divisors (4408245).

6644043 is a wasteful number, since it uses less digits than its factorization.

6644043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 6644043 is about 2577.6041201084. The cubic root of 6644043 is about 187.9940676414.

The spelling of 6644043 in words is "six million, six hundred forty-four thousand, forty-three".