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Numbuh 6,700 is a future Sector V operative from Operation: W.H.I.T.E.H.O.U.S.E.. He has blonde spiky hair and he wears blue jeans and shoes similar to those Numbuh 4 wears. Numbuh 6,700 has a green bandana tied to his head, which covers his eyes, and also wears a brown jacket and an orange t-shirt.
- Numbuh 6,700's hairstyle is similar to Bart Simpson's and Gus Griswald's hairstyle.
- Numbuh 6,700 is heavily implied to be the potential future child of Numbuh 3 and Numbuh 4.