"Five thousand five hundred to the nearest thousandths".
The second half of the phrase is important because otherwise you are losing the information of the three 0s after the decimal point.
Five million, five hundred thousand.
fifty million
Fifty billion.
Sixty-two million
12,000,000,000 = Twelve billion
Five million, five hundred thousand.
The number 20 is written as: twenty.Twenty.
The word form is: two hundred octovigintillion.
Fifty trillion.
Six trillion.
fifty million
Fifty billion.
Three point six five is how the number 3.65 is written in word form.
5,000,000,000 = five billion
Sixty-two million
12,000,000,000 = Twelve billion
Word-form . . . on a check or a formal invitation Standard form . . . everywhere else