Numbuh 6,700 is a future Sector V operative from Operation: W.H.I.T.E.H.O.U.S.E.. He is possibly Numbuh 4's relative, considering he has the same hair color, he also wears the same blue jeans and shoes Numbuh 4 wore. The only difference is he has a spiky hair instead of bowl-shaped cut like Numbuh 4, he has a green bandana tied to his head which covered his eyes. He also wear a brown jacket and an orange T-shirt inside. He is larger than Numbuh 4.