This is gonna draw a lot of eyes depending on how it's used (like paying off a mortgage or large cash purchases) so in this scenario where the money magically appeared I'd just buy a very large safe and start making cash purchases for everyday items like groceries, gas, etc.
I would then increase my retirement contributions and pay off my mortgage earlier.
Advice from a dryer: Open the door to amazement. Don't shrink from your true calling. Accept life's wrinkles. Avoid overload. Reach into mystery!