6644245 has 8 divisors (see below), whose sum is σ = 8003160. Its totient is φ = 5295360.

The previous prime is 6644227. The next prime is 6644269. The reversal of 6644245 is 5424466.

It can be written as a sum of positive squares in 4 ways, for example, as 54756 + 6589489 = 234^2 + 2567^2 .

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

It is not a de Polignac number, because 6644245 - 2⁹ = 6643733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960 + ... + 3769.

It is an arithmetic number, because the mean of its divisors is an integer number (1000395).

Almost surely, 2^6644245 is an apocalyptic number.

It is an amenable number.

6644245 is a deficient number, since it is larger than the sum of its proper divisors (1358915).

6644245 is a wasteful number, since it uses less digits than its factorization.

6644245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5015.

The product of its digits is 23040, while the sum is 31.

The square root of 6644245 is about 2577.6433034848. The cubic root of 6644245 is about 187.9959728276.

It can be divided in two parts, 6644 and 245, that added together give a square (6889 = 83²).

The spelling of 6644245 in words is "six million, six hundred forty-four thousand, two hundred forty-five".