The decision came "after much pressure" from Egyptian Internet users that strange rituals were going to be held "within the walls of the pyramid on November 11, 2011," Atef Abu Zahab, head of the Department of Pharaonic Archaeology, told AFP.
The Supreme Council of Antiquities confirmed the closure Friday of the tourist site, in a statement that only referred to the need for maintenance following a busy period during Muslim holidays.
The Pyramid of Cheops is the biggest and most famous of the three Giza pyramids. It houses the tomb of Pharaoh Khufu, and is the only surviving one of the seven wonders of the ancient world.
Numerologists are anxiously awaiting Friday, when the digital alignment of ones occurs at 11:11 am, which some believe will lead to unusual events.
Thousands of people plan to meet at the time around the world for ceremonial dances, and several pages devoted to the date have appeared on social networking website Facebook.
Some attribute the number 11 to paranormal powers that provide a channel of communication with the subconscious, others see a mystical connection between the number and disasters, like the 9/11 attacks on the United States.