666 Explained: Person, System, or Both?

Lucky Number 3 lyrics - meant to be (song lyrics)

Graham's Number (G64) is an unimaginably, ridiculously large number that originated in Ramsey theory within mathematics. It is so massive that the observable universe literally does not contain enough physical space or atoms to write down its digits, even if every single subatomic particle were converted into a tiny pen and ink. To even begin writing Graham's Number, standard scientific notation fails completely. Mathematicians have to use special arrow notation, building a tower of exponents so

Introduction to rational and irrational numbers | Algebra I | Khan Academy