6644363 has 8 divisors (see below), whose sum is σ = 7302960. Its totient is φ = 5994880.

The previous prime is 6644359. The next prime is 6644371. The reversal of 6644363 is 3634466.

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

It is a cyclic number.

It is not a de Polignac number, because 6644363 - 2² = 6644359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6644863) 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 7 ways as a sum of consecutive naturals, for example, 698 + ... + 3711.

It is an arithmetic number, because the mean of its divisors is an integer number (912870).

Almost surely, 2^6644363 is an apocalyptic number.

6644363 is a deficient number, since it is larger than the sum of its proper divisors (658597).

6644363 is a wasteful number, since it uses less digits than its factorization.

6644363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557.

The product of its digits is 31104, while the sum is 32.

The square root of 6644363 is about 2577.6661925083. Note that the first 3 decimals coincide. The cubic root of 6644363 is about 187.9970857402.

It can be divided in two parts, 6644 and 363, that added together give a palindrome (7007).

The spelling of 6644363 in words is "six million, six hundred forty-four thousand, three hundred sixty-three".