Does Multimillion Have a Hyphen?

On a related note, multi-million has a superfluous hyphen; it should be multimillion (which is never used in isolation—it's always part of a phrasal adjective), so avoid constructions such as “multi-million dollar damages,” which erroneously refers to dollar damages of a multi-million nature, or “multi-million-dollar ...

Is multimillion hyphenated?

Compound adjectives are usually hyphenated, as we see in a simpler example like “a good-looking dog.” ... That's why “multi” doesn't need a hyphen to attach to “million,” but “multimillion” needs one to join forces with “dollar” and create a compound adjective.

How do you write multi billion dollars?

A common error is to refer to very large amounts of money with a phrase like “multi-billion-dollar budget” or, worse, “multi-billion dollar budget.” However, words prefixed by multi need no hyphen: “multibillion-dollar budget.”