They're wheat stalks, not "fethers" - and the word is FEATHERS, in any case.
Wheat-back cents from the 1940s and 1950s are generally pretty common and are only worth a few cents in circulated condition. Older coins can be worth more, depending on their dates what what mint mark letter, if any, is under the date.
Double struck pennies like you describe are generally worth $30-$50
You can use a metal polish to get pennies back to looking new.
Lincoln is pictured on usually pictured on the front of the penny. 2009 is the only date that he was on the back. These pennies are very common and worth only 1 cent.
Wheat ears, not "feathers" Cents, not "penneys". "Penneys" is a department store. And "pennies" are British coins. Yes, some of them can be valuable but it depends on their dates and what mint mark they have under the date. You can find values at the links below
It is probably worth a small fortune.
Yes and no. Yes, they are technically worth about 2.2 cents in copper value (pre-1982 pennies are 95% copper, post-1982 pennies are mostly zinc and are worth about half a cent in zinc scrap) but they are illegal to melt down and as such you will have a hard time finding someone to buy them. 1965 pennies are not rare by any stretch and as such you should just spend it like any other penny. Unless the penny has an error (or you have a /lot/ of copper cents to sell to someone, or if the penny is in mint packaging) if it has a memorial on the back of the coin, simply spend it.
wheat pennies were made by the billion back then and are not worth more than 50 cents even uncirculated
Pennies were not made by US mints in 1717. In fact mints were not even established yet back 1717.
If the back of the penny is just blank, this penny can be worth a fortune. Have the penny appraised at a coin dealer.
These pennies are called "Wheat Pennies". They were last made in 1958.
These are known as wheat back pennies. The "feathers" are actually wheat ears. These are fairly common coins and can be acquired in circulation. Pennies made before the 1940s are generally the ones that are worth more. These are worth maybe 7-12 cents depending on condition, date, and mintmark. Cents made from 1940-1958 are usually only worth 3-9 cents in circulated condition. The value rises for uncirculated coins but it varies a lot by the rarity.
It is worth 1 piso.