title: Longest words
context: In German, whole numbers (smaller than 1 million) can be expressed as single words, which makes siebenhundertsiebenundsiebzigtausendsiebenhundertsiebenundsiebzig (777,777) a 65 letter word. In combination with -malig or, as an inflected noun, (des …) -maligen, all numbers can be written as one word. A 79 letter word, Donaudampfschiffahrtselektrizitätenhauptbetriebswerkbauunterbeamtengesellschaft, was named the longest published word in the German language by the 1972 Guinness Book of World Records, but longer words are possible.  The word was the name of a prewar Viennese club for subordinate officials of the headquarters of the electrical division of the company named the Donaudampfschifffahrtsgesellschaft, which operated steam boats on the Danube river.
question: What is the longest word in German?
answers: siebenhundertsiebenundsiebzigtausendsiebenhundertsiebenundsiebzig