So my friend messaged me.

"My lucky number is four billion. That doesn't come in real handy when you're gambling. 'Come on four billion! Fuck! Seven. Not even close. I need some more dice. Four billion divided by six, at least.'"

Which got me interested.

"For four billion by six, you'd need to get all four billion dice to hit six. A more realistic number would be 4 billion by three.

Which comes out to roughly 1,333,333,333 dice.
...