6644225 has 12 divisors (see below), whose sum is σ = 9416064. Its totient is φ = 4555920.

The previous prime is 6644191. The next prime is 6644227. The reversal of 6644225 is 5224466.

It is not a de Polignac number, because 6644225 - 2⁸ = 6643969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6644227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18809 + ... + 19158.

It is an arithmetic number, because the mean of its divisors is an integer number (784672).

Almost surely, 2^6644225 is an apocalyptic number.

It is an amenable number.

6644225 is a deficient number, since it is larger than the sum of its proper divisors (2771839).

6644225 is a wasteful number, since it uses less digits than its factorization.

6644225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37984 (or 37979 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 6644225 is about 2577.6394239691. The cubic root of 6644225 is about 187.9957841970.

The spelling of 6644225 in words is "six million, six hundred forty-four thousand, two hundred twenty-five".