How would I go about solving this question?

The least integer of a set of consecutive integers is -25. If the sum of these integers is 26, how many integers are there in this set?

I have no idea how to solve this question. I guess I would start off with

-25 + -24 + -23 + -22 + -21, and continue but that would be impracticle, is there any way to use algebra or something to solve this type of question? Please help! Thankyou.