6688025 has 6 divisors (see below), whose sum is σ = 8293182. Its totient is φ = 5350400.

The previous prime is 6688013. The next prime is 6688027. The reversal of 6688025 is 5208866.

6688025 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1471369 + 5216656 = 1213^2 + 2284^2 .

It is not a de Polignac number, because 6688025 - 2¹⁶ = 6622489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6688027) 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, 133736 + ... + 133785.

It is an arithmetic number, because the mean of its divisors is an integer number (1382197).

Almost surely, 2^6688025 is an apocalyptic number.

It is an amenable number.

6688025 is a deficient number, since it is larger than the sum of its proper divisors (1605157).

6688025 is a wasteful number, since it uses less digits than its factorization.

6688025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267531 (or 267526 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 6688025 is about 2586.1216135364. The cubic root of 6688025 is about 188.4079811291.

The spelling of 6688025 in words is "six million, six hundred eighty-eight thousand, twenty-five".