Kopeyka
Ruble and Kopek.
The smallest Euro note is €5. Below that is the €2 coin and the €1 coin.
Because there is no other coin that is smaller.
It depends on the nation. The smallest circulating US coin is a dime, but for other countries it really depends. But the smallest historic coin that the US has minted for circulation is the silver three cent piece.
the smallest value of a coin is a penny.
Lepta
cost of silver
A "koiienka" coin is from Russia. The coin is lettered in the Cyrillic alphabet used by Russian and several other Slavic languages. The Russian spelling is "копе́йка", which is usually translated into English as "kopecks".
1 euro cent
It seems like you have a Russian coin dated 1998. The coin is likely a circulation coin from that year, possibly featuring symbols relevant to Russian history or culture. The design and denomination of the coin can provide more specific information about its value and background.
Coin Collector
10
From 1933 until 1940, the smallest denomination New Zealand coin in circulation was the Threepence. From 1940 until 1967, the smallest denomination New Zealand coin in circulation was the Halfpenny. All other predecimal coins circulating in New Zealand prior to decimalisation were mostly British with some Australian coins. Some of the British coins may have included the Farthing and maybe even some fractional Farthings. From the introduction of decimal currency in 1967, the smallest denomination New Zealand coin was the 1 cent coin until the 1 and 2 cent coins were withdrawn and demonetised in 1990. From 1990, the smallest denomination New Zealand coin was the 5 cent coin until it withdrawn and demonetised in 2006. Since 2006, the smallest denomination New Zealand coin is the 10 cent coin.