6687225 has 24 divisors (see below), whose sum is σ = 12285920. Its totient is φ = 3566160.

The previous prime is 6687209. The next prime is 6687229. The reversal of 6687225 is 5227866.

It is not a de Polignac number, because 6687225 - 2⁴ = 6687209 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6687225.

It is not an unprimeable number, because it can be changed into a prime (6687229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4279 + ... + 5628.

Almost surely, 2^6687225 is an apocalyptic number.

It is an amenable number.

6687225 is a deficient number, since it is larger than the sum of its proper divisors (5598695).

6687225 is a wasteful number, since it uses less digits than its factorization.

6687225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9926 (or 9915 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 6687225 is about 2585.9669371436. The cubic root of 6687225 is about 188.4004685777.

The spelling of 6687225 in words is "six million, six hundred eighty-seven thousand, two hundred twenty-five".