6644741 has 6 divisors (see below), whose sum is σ = 6882642. Its totient is φ = 6414800.

The previous prime is 6644717. The next prime is 6644753. The reversal of 6644741 is 1474466.

It can be written as a sum of positive squares in 3 ways, for example, as 1600225 + 5044516 = 1265^2 + 2246^2 .

It is not a de Polignac number, because 6644741 - 2¹⁴ = 6628357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6644698 and 6644707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3110 + ... + 4791.

It is an arithmetic number, because the mean of its divisors is an integer number (1147107).

Almost surely, 2^6644741 is an apocalyptic number.

It is an amenable number.

6644741 is a deficient number, since it is larger than the sum of its proper divisors (237901).

6644741 is an equidigital number, since it uses as much as digits as its factorization.

6644741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7959 (or 7930 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 6644741 is about 2577.7395136049. The cubic root of 6644741 is about 188.0006507447. Note that the first 3 decimals are identical.

The spelling of 6644741 in words is "six million, six hundred forty-four thousand, seven hundred forty-one".