请用英语翻译下这8个数字的英文急用

973 nine hundred and seventy-three
3980 three thousand,nine hundred and eighty
98721 ninety-eight thousand,seven hundred and twenty-one
768540 seven hundred and sixty-eight thousand,five hundred and forty
5555555555 five billion,five hundred and fifty-five million,five hundred and fifty-five thousand,five hundred and fifty-five
2346780 two million,three hundred and forty-six thousand,seven hundred and eighty
82364580 eighty-two million,three hundred and sixty-four thousand,five hundred and eighty
405000000 four hundred and five million
好累啊 不知你做什么用 呵呵

3980:Three thousand nine hundred and eighty
79821:Seventy-nine thousand eight hundred and twenty-one
768540:Seven hundred and sixty-eight thousand five hundred and forty

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