Here's how big the iPhone is as a business, according to Bloomberg: If the iPhone were its own company, its revenues would be greater than Procter & Gamble, Coca-Cola, Goldman Sachs, Google and Microsoft.
On its own, the iPhone is the ninth biggest stock in the Dow, and has bigger sales than 474 S&P 500 companies. (Apple sold 9 million new iPhone 5S's and iPhone 5C's just last weekend.)
A big part of those giant revenues come from margin, or course. ZDNet notes that up to 74% of the full price $849 iPhone 5S can be margin over the actual $218 cost it takes to build an iPhone.
You can read Bloomberg's full story here, but here's one of its charts showing iPhone's revenues compared to other blue-chip companies:
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