Google has received a record $6.85 billion antitrust fine for the way it pushes its Android operating system.

The new penalty from European regulators is nearly double the $3.7 billion Google was ordered to pay last year over its online shopping search service.

However, the fine represents just over two weeks of revenue for Google’s parent company Alphabet Inc, and is just a thin slice of its $140 billion in cash reserves.

“Google has used Android as a vehicle to cement the dominance of its search engine,” said EU antitrust chief Margrethe Vestager.

“These practices have denied rivals the chance to innovate and compete on the merits. They have denied European consumers the benefits of effective competition in the important mobile sphere.”

Ms Vestager also ordered Google to halt anti-competitive practices in contracts with smartphone makers and providers within 90 days, or face additional penalties of up to 5 per cent of Alphabet's average daily worldwide turnover.

Ms Vestager is running a series of cases against Google, but also made headlines when she demanded that the Irish government take back up to 13 billion euros from Apple Inc.

She denied the EU regulator has an anti-US bias.

“But the fact is that this has nothing to do with how I feel. Nothing whatsoever. Just as enforcing competition law, we do it in the world, but we do not do it in political context,” Ms Vestager said.

Google says it will appeal the fine.

“Android has created more choice for everyone, not less. A vibrant ecosystem, rapid innovation and lower prices are classic hallmarks of robust competition,” it said.