I would write it like this 5,000,000.
5,000,005
To write five million dollars in numbers, you would write $5,000,000.00. Five million dollars would be written with the number five followed by six zeros, a decimal point, and two more zeros.
5,000,000
5,000,000,000
500,000,000
0.5 million = 500,000 (five hundred thousand).
Two million and five hundred and fifty thousand in numbers is 2,550,000
15,005,000
$45000000
11,000,500
1,000,580
5,800,000