This coin is 40% silver. Too bad it is not from 64 or earlier, as those were 90% silver. It is worth a dollar or two.
The 1966 Kennedy half dollar is 40% silver and worth about $5.00.
Kennedy half dollars dated from 1965 to 1970are only40% silver. A 1966 is not rare, most are only valued for the silver about $5.
The U.S. struck its last silver dollars in 1935. New dollar coins weren't struck again until 1971 and they were made of nickel and copper. Please check your coin again and post a new question. Check its denomination and any other wording that might help ID it. If it's a HALF dollar it's only 40% silver and is worth about 3 bucks at today's silver prices. Also note that halves dated 1971 and later are copper-nickel too, and are only worth 50 cents.
If it is a US dime, it isn't silver. Silver stopped being used in dimes after 1964, so any dime dated 1965 or later is struck in copper-nickel and are only worth face value.
The last U.S. silver dollars were made in 1935. Please determine what country and denomination coin you have and post a new question.
The 1966 Kennedy half dollar is 40% silver and worth about $5.00.
No US quarters dated 1966 are silver. The only US quarters struck in silver are dated 1964 or before with the exception of silver proof sets (most proof sets are -not- silver and silver proof sets are marked as silver) but those are dated from 1992-present.
Its worth about $5 in scrap silver. It is 40% silver and only worth scrap silver.
About $2.00
Kennedy half dollars dated from 1965 to 1970are only40% silver. A 1966 is not rare, most are only valued for the silver about $5.
It's currently worth about $4 for its silver content.
As of February 2018, it's worth about $2.50 for the silver.
All US 1966 half dollars are 40% silver, containing about $3.32 worth of silver at the time of writing.
It's only partial silver -- worth about $2.00
It's worth about $4 for its silver content.
If one existed it would likely be of the Peace dollar design but the US did NOT make any one dollar coins dated 1966.
They're worth about $2.50 a piece for the silver.