(Refiles to remove extraneous text from dateline) Jan 7 (Reuters) - Playtika Holding Corp, a mobile gaming company owned by a Chinese investor group, said on Thursday it was aiming to raise as much as $1.67 billion in it initial public offering (IPO), giving it a valuation of nearly $10 billion. (Reporting by Noor Zainab Hussain in Bengaluru; Editing by Anil D’Silva)