6647825 has 12 divisors (see below), whose sum is σ = 8384880. Its totient is φ = 5226960.

The previous prime is 6647813. The next prime is 6647831. The reversal of 6647825 is 5287466.

It is a happy number.

6647825 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6647825 - 2⁶ = 6647761 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 779 + ... + 3728.

It is an arithmetic number, because the mean of its divisors is an integer number (698740).

Almost surely, 2^6647825 is an apocalyptic number.

It is an amenable number.

6647825 is a deficient number, since it is larger than the sum of its proper divisors (1737055).

6647825 is a wasteful number, since it uses less digits than its factorization.

6647825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576 (or 4571 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 6647825 is about 2578.3376427458. The cubic root of 6647825 is about 188.0297316038.

The spelling of 6647825 in words is "six million, six hundred forty-seven thousand, eight hundred twenty-five".