siebzig

Siebzig is the German word for the number 70. It is used in everyday counting, dates, ages, and measurements. The numeral form is 70, and the Roman numeral is LXX.

Etymology: The form siebzig derives from seven combined with a -zig suffix, a pattern used in German to denote tens. The stem sieb- is related to the word sieben (seven); older spellings such as siebenzig exist in historical texts, but the modern standard is siebzig.

Usage: As a cardinal number, siebzig appears in contexts such as age or quantities. The ordinal form is siebzigste (70th). In dates and schedules, you may encounter phrases like am siebzigsten Geburtstag (on the seventieth birthday).

In larger numbers, 71–79 are formed by combining the unit with seventy, for example einundsiebzig (71) and neunundsiebzig (79).

Mathematics and representation: The number 70 is a composite number with divisors 1, 2, 5, 7, 10, 14, 35, and 70. The sum of its proper divisors is 74, so 70 is an abundant number. In Roman numerals, 70 is written as LXX.