Can you find the hidden number in THIS optical illusion?

New Delhi: Optical illusions are amazing. They play mind tricks on people, frequently perplexing them. They are, however, a lot of fun to respond. Such posts abound on the Internet, leaving people perplexed but thoroughly amused. In fact, there are a plethora of optical illusion videos and images available on the Internet. For example, this one involves numbers concealed in the image mentioned below and is an excellent addition to the category of intriguing optical illusions.

Examine the image carefully to see if you can spot the number. Act quickly, as time is running out. Half of the time is already up. Only four to five seconds remain. Do you want to find out what's hidden? Here's the answer: