Strangely enough, this cartoon has a cast album that features the famous theme song as well as songs written specifically for the album itself. Also called 'The Mighty Hercules', the album first came out as a record in 1963.
In the legend, Hercules was far from being the noble hero that the cartoon portrays him as: he is described as being a womanizer, a glutton with a rapacious appetite for food, and the murderer of his wife and children.
Bruce Timm modelled his Supernan for Superman: The Animated Series after this version of Hercules.
The character of Hercules, as realized for this cartoon looks exactly like Superman apart from the costume. Why this was done is a mystery.