6647125 has 16 divisors (see below), whose sum is σ = 8504496. Its totient is φ = 5184000.

The previous prime is 6647111. The next prime is 6647129. The reversal of 6647125 is 5217466.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1656369 + 4990756 = 1287^2 + 2234^2 .

It is not a de Polignac number, because 6647125 - 2⁹ = 6646613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4477 + ... + 5773.

It is an arithmetic number, because the mean of its divisors is an integer number (531531).

Almost surely, 2^6647125 is an apocalyptic number.

It is an amenable number.

6647125 is a deficient number, since it is larger than the sum of its proper divisors (1857371).

6647125 is a wasteful number, since it uses less digits than its factorization.

6647125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353 (or 1343 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 6647125 is about 2578.2018927927. The cubic root of 6647125 is about 188.0231316792.

The spelling of 6647125 in words is "six million, six hundred forty-seven thousand, one hundred twenty-five".