general_fact: 6 is the highest number on one end of a standard domino.
math_fact: 6 is a unitary perfect number, a harmonic divisor number and a highly composite number.
trivia: 6 is the number of days taken to create the world by Yahweh in the Old Testament Book of Genesis, and the number of the day on which humankind were created.
historical_date: January 6th is the day in 1721 that the Committee of Inquiry on the South Sea Bubble publishes its findings.