It depends which scale you use which depends upon where you are:
or
6,349,000,781 = six milliard, three hundred and forty nine million, seven hundred and eighty one
Though, the Americans may write it:
6,349,000,781 = six billion, three hundred forty nine million, seven hundred eighty one
(Canada appears to use both scales, depending upon whether they are French (long scale) or English (short scale) speaking.)
0.0658 IS in written form!?
It is already written in standard form.
It is already in standard form as written.
It is already in standard form as written.
I suppose it is written in invisible form!
It is already in standard form as written.
83 written in standard form?
The number that appears in the question is in written form rather than audible form!
It is already written in standard form.
It is already in standard form as written. (632,000)
4x4x4 written in standard form
The written form of 10.7 is "ten point seven."