Sigh. Strange that a million of something is e7, but a millionth of something is e-8. European number system fail.
You were off by one the other way, one microsecond is e-6. And a million of something is e6, not e7, just as a millionth of something is e-6.
"Marriage is like a cage; one sees the birds outside desperate to get in, and those inside desperate to get out." -- Montaigne