Nov 5 (Reuters) - Electric vehicle maker Rivian Automotive Inc, which is backed by both Amazon.com Inc and Ford Motor Co, said on Friday it was targeting a valuation of up to $63.11 billion in its initial public offering in the United States. The company currently expects the IPO price range to be between $72 and $74 per share. (Reporting by Niket Nishant in Bengaluru; Editing by Arun Koyyur)