Is 165,760,000 square kilometers as big as The Great Barrier Reef?
It's about 500 times as big as The Great Barrier Reef

The size of The Great Barrier Reef is about 348,000 square kilometers.
(a.k.a. Barrier Reef) (Coral Sea, off Queensland, Australia) (approximate)
The Great Barrier Reef, the largest such reef in the world, covers about 348,000 sq. km. Reefs, such as the Great Barrier, grow in diameter at a rate of 1 to 3 cm per year.
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