Final answer:
To round 6.2134618797 to the nearest millionth, which is 6 places after the decimal, you would get 6.213462 since the seventh digit is less than 5.
Step-by-step explanation:
To round the number 6.2134618797 to the nearest millionth, you need to look at the seventh decimal place (which is the digit '1' in this case) and determine whether it is 5 or greater. If it is, you would round up the millionth place, and if it is less than 5, you would round down. In this case, since the seventh digit is '1', which is less than '5', you do not round up. Therefore, rounded to the nearest millionth, the number would be 6.213462.