It's about as heavy as a Pig.
(Domestic pig, Sus scrofa domesticus, a.k.a. S. domesticus) (adult)
Domestic pigs weigh between 550 pounds. The titular character "Babe the pig" in the 1995 family film was played by 48 different American Yorkshire piglets due to the length of filming and the rate at which piglets reach adulthood.
It's about one-and-one-tenth times as heavy as a cubic meter of Snow.
In other words, the weight of a cubic meter of Snow is 0.910 times 551.15565550 pounds.(Freshly fallen, standard conditions; measurements taken in Norway, 1965-68)
One cubic meter of freshly fallen snow under standard conditions weighs an average of 510 pounds. Assembled in 2008, the world record largest snowman was constructed of 13,000,000 pounds of snow and stood 37.21 m (122.1 ft) tall.
It's about one-and-three-tenths times as heavy as The Heart of a Blue Whale.
It's about one-and-a-half times as heavy as a Reindeer.
In other words, 551.15565550 pounds is 1.510 times the weight of a Reindeer, and the weight of a Reindeer is 0.6620 times that amount.(for Rangifer tarandus granti, adult, bull) (a.k.a. Caribou) ()Rangifer tarandus)
An adult, male reindeer weighs between 365 pounds. Reindeer undertake a lengthy annual migration, with some herds traveling up to 5,000 km.
To all those observing, Merry Christmas from the Measure of Things.
It's about three-fifths as heavy as a Horse.
In other words, the weight of a Horse is 1.70 times 551.15565550 pounds.(Equus ferus caballus) (Arabian, adult)
n Arabian riding horse (or similar breed) weighs between 930 pounds. During races, horses must carry jockeys and their equipment, which in the Kentucky Derby, for example, can weigh up to 120 pounds.
It's about one-and-seven-tenths times as heavy as a Panda Bear.
In other words, the weight of a Panda Bear is 0.590 times 551.15565550 pounds.(a.k.a. Giant Panda, Ailuropoda melanoleuca)(Adult, male)
An adult, male Giant Panda weighs up to 330 pounds. Despite having the digestive system of a carnivore, the panda eats only bamboo and must eat up to 14 pounds of it per day to compensate for the limited energy the plant provides.
It's about three-fifths as heavy as a Grand Piano.
In other words, 551.15565550 pounds is 0.560 times the weight of a Grand Piano, and the weight of a Grand Piano is 1.80 times that amount.(for Steinway & Sons, Model D Concert Grand Piano)
A Grand Piano, of the kind used for concert performances in large music halls, weighs 990 pounds. Well-made pianos such as this may last 75 to 100 years.