2,763 is a reoccurring number in the series, most commonly used as the number of miles from where BFDI takes place to Battle for Dream Island Yoyleland.
The Glistening - During the challenge (which is jumping as farthest as possible), Leafy uses her map in mid-air to transport to Yoyleland, thus winning the challenge with 2,763 miles.
Get Digging - Team No-Name has a lack of yoyleberries for the challenge, which is making Yoylestew. Firey exclaims that the yoyleberries are in Yoyleland, which is 2,763 miles away.
Get in the Van - During the intro, Leafy (now turned into metal from eating yoyleberries) comes back after a 2,763-mile walk to see Pin and Bubble.
Another instance is when Ruby spins the challenge wheel and lands on "Reach the summit of Yoyle Mountain". As Needle questions where it is, Coiny brings up that it's 2,763 miles away.
BFDIA 6 Deleted Scenes - In one scene, both Book and Pencil worry about how the Clubhouse of Awesomeness is atop the Eiffel Tower, which is 2,763 miles away.
Fortunate Ben - During Liy's elimination, Remote mentions that Death P.A.C.T. has saved 2,763 lives.
The distance displayed in the Distance Tracker 2000
No More Snow! - Needle takes out her Distance Tracker 2000 to check how far Yoyle Mountain is from where they are, which is 70 feet. She accidentally had it set to the distance to Evil Canyon. Coiny changes it, and it reveals that Yoyle Mountain is really 2,761 miles from their current location.
Fortunate Ben - Liy prevented 2,753 deaths.
2,763 is occasionally mentioned by Cary in his (non-BFDI) videos.