The world’s population is a little over 7 Billion people (http://www.census.gov/popclock).
One group (the Traveling Team) has calculated:
If you took 7 billion steps along the Earth’s equator — at 2 feet per step — you could walk around the world at least 106 times.
Seven billion ants would weigh at least 23 tons (46,297 pounds).
When you are between 31 and 32 years old, you will have lived for 1 billion seconds. To reach 7 billion seconds, you would have to live to be 220 years old!
The Earth measures 24,900 miles around the middle. To travel 7 billion miles, you would have to circle the globe nearly 300,000 times.