20664 is a Postal Code in Charles County.
- 20664 a.k.a. Steven Seagal: Lawman is an American reality television series that aired on A&E for its first two seasons and Reelz for its third. It stars actor and martial artist Steven Seagal performing his duties as a reserve deputy sheriff in Jefferson Parish, Louisiana and Maricopa County, Arizona. It premiered on December 2, 2009.
- 20664 a.k.a. Sox1 is a protein.
- also known as SRY-box containing gene 1, Sox-1, Sex determining region Y-box 1