Il numero 640, seicentoquaranta in Italiano, in Inglese si dice six hundred forty.
Il numero ordinale 640° in inglese si dice six hundred fortieth.
631: six hundred thirty-one
632: six hundred thirty-two
633: six hundred thirty-three
634: six hundred thirty-four
635: six hundred thirty-five
636: six hundred thirty-six
637: six hundred thirty-seven
638: six hundred thirty-eight
639: six hundred thirty-nine
641: six hundred forty-one
642: six hundred forty-two
643: six hundred forty-three
644: six hundred forty-four
645: six hundred forty-five
646: six hundred forty-six
647: six hundred forty-seven
648: six hundred forty-eight
649: six hundred forty-nine