According to Don Knotts's autobiography, the off-screen voice yelling, "Attaboy, Luther!" belongs to screenwriter Everett Greenbaum.
This film inspired a short-lived craze for yelling out "Attaboy, (name)" during speeches and other situations. This came from a running gag used in this film. The Farrelly Brothers used the same gag in Kingpin (1996).
The film earned $1,245,684 during its first week of release, making it the #1 top grossing movie of the week.
Prior to doing this film, Joan Staley had posed nude as a Playboy Playmate in 1958, and had played a minor role in the Elvis Presley/Barbara Stanwyck vehicle Roustabout (1964).
The "Simmons Mansion" was next door to the Munster Mansion on the Universal back lot. It appears, without the fence, in the opening credits of Munster, Go Home! (1966). However, the Munsters house doesn't appear in this film.