Fatto matematico: 6427 is the number of ways a 6×6 square can be tiled with 1×1 and 2×2 squares.
Trivia: 6427 is a boring number.
Data storica: August 5th is the day in 1925 that Plaid Cymru is formed with the aim of disseminating knowledge of the Welsh language that is at the time in danger of dying out.