general_fact: 7648 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 7648 is the number of ways a 10×1 rectangle can be surrounded by 10×1 rectangles.
trivia: 7648 is an unremarkable number.
historical_date: December 8th is the day in 1972 that United Airlines Flight 553 crashes after aborting its landing attempt at Chicago Midway International Airport, killing 45.