In Roman numerals, the letter D was used to represent 500, though it's hard to consider Roman numerals an "abbreviation" per se ("1776" is much shorter than MDCCLXXVI).
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C is an abbreviation for hundred
eight vigintillion five hundred fifty five novemdecillion (novendecillion) two hundred twenty two octodecillion two hundred twenty five septendecillion five hundred fifty five sexdecillion (sedecillion) five hundred fifty five quindecillion (quinquadecillion) five hundred fifty five quattuordecillion five hundred fifty five tredecillion five hundred fifty five duodecillion five hundred fifty five undecillion five hundred fifty five decillion five hundred fifty five nonillion five hundred fifty five octillion five hundred fifty five septillion five hundred fifty five sextillion five hundred fifty five quintillion five hundred fifty five quadrillion five hundred fifty five trillion five hundred fifty five billion five hundred fifty five million five hundred fifty five thousand five hundred fifty five
There is no specific word abbreviation.
500,000,000,000 = five hundred billion 500,000,000 = five hundred million 500,000 = five hundred thousand 500 = five hundred
Hundred means the numbers contains up to a 100