It's about 15,000 times as heavy as a Football (American)
In other words, 0.00000610 megatonnes is 14,839.390889130 times the weight of a Football (American), and the weight of a Football (American) is 0.000067388210706990 times that amount.(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 0.000000000396893323750 megatonnes and 0.0000000004252428468750 megatonnes. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.
It's about 15,000 times as heavy as a Can of Soup
In other words, the weight of a Can of Soup is 0.0000590 times 0.00000610 megatonnes.(for Campbell''s Condensed Tomato Soup, 317.9 ml)
A can of Campbell''s Tomato Soup weighs 0.000000000350 megatonnes. Cans have been used to store soup and other foods since their invention in 1913, but a dedicated can opener was not developed until cans began to use thinner materials — prior to that time, cans were usually opened using various blunt instruments and tools.
It's about one-twenty-thousandth as heavy as The CN Tower
In other words, 0.00000610 megatonnes is 0.0000517340 times the weight of The CN Tower, and the weight of The CN Tower is 19,330 times that amount.(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada)
The CN Tower weighs approximately 0.117910 megatonnes. The Tower is home to the world's highest glass floor — a viewing area that allows visitors to look straight down 342 m (1,120 ft) to the ground below.
It's about 20,000 times as heavy as a Human Heart
It's about 30,000 times as heavy as a Hamster
In other words, the weight of a Hamster is 0.0000300 times 0.00000610 megatonnes.(for Syrian hamster, a.k.a. golden hamster, a.k.a. Mesocricetus auratus; adult)
An adult Syrian hamster has a typical weight of about 0.000000000200 megatonnes. Known for transporting food in the pouches of their cheeks so that they can bury it later, some hamsters can store up to 0.0000000300 megatonnes of food in their borrows.
It's about one-thirty-five-thousandth as heavy as The Sears Tower
In other words, 0.00000610 megatonnes is 0.000030230 times the weight of The Sears Tower, and the weight of The Sears Tower is 33,080 times that amount.(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 0.20180 megatonnes. The outer wall surface of the Tower is covered with black anodized aluminum panels which would total 110,000 sq. m (28 acres) if laid out together.
It's about 35,000 times as heavy as a Billiard Ball
In other words, 0.00000610 megatonnes is 37,421.072676946 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 0.0000267229111424180 times that amount.(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 0.00000000015592237718750 megatonnes and 0.000000000170097138750 megatonnes. According to legend, the difficulty in obtaining elephant ivory for the manufacture of billiard balls in the 19th century inspired the search for a replacement material, which led to the development of the first industrial plastic.