Find the Mystery Number

1. I am a 9-digit number.  My hundred millions digit is greater than 6 and is double my thousands digit.  The digits in the units period are all 1s.  Each of the other digits is an odd number greater than 7.  What number am I?

2.  Write the following number in expanded form and in words
458 342 167 989. 56

3.  What is the value of the 1? 5? Place value of the 4?