Webmath has another take on this: some other odds for the sake of comparison:
You have about a 1 in 2,000,000 chance of being struck by lightning.
A pregnant woman has a 1 in 705,000 chance of giving birth to quadruplets.
Someone eating an oyster has a 1 in 12,000 chance of finding a pearl inside of it.
Alternately, there is one method that's a sure thing:
If you want to win big, consider taking that $10 a week you might spend on lottery tickets and investing it. After 35 years, you will be guaranteed $100,314.56 — if you get an eight per cent return on your investment. With a 10 per cent return, your weekly $10 would be worth a guaranteed $166,742.59. Make it $12 a week and at 10 per cent, you've squirrelled away $200,091.10 after 35 years. Again, guaranteed.