It's about 550,000 times as heavy as an Eye (Human)
It's about 650,000 times as heavy as a Quarter
In other words, 3,750,000 grams is 661,400 times the weight of a Quarter, and the weight of a Quarter is 0.0000015120 times that amount.(United States quarter-dollar coin) (a.k.a. Quarter dollar, a.k.a. America the Beautiful quarter, a.k.a. two bits)
The America the Beautiful series quarters, which began to enter circulation in 2017, weigh 5.670 g each. In answer to the common riddle, there are 119 ridges around the edge of the coin in its current design.
It's about 750,000 times as heavy as a sheet of Paper
In other words, the weight of a sheet of Paper is 0.00000130 times 3,750,000 grams.(for US Letter, a.k.a. ANSI A; 215.9mm by 279.4mm (8.5 in x 11 in); 20lb)
The weight of a ream (500 sheets) of 9,100 grams, 8.5 inch x 11 inch paper is 2,000 grams, each sheet weighing 5 g. Paper of this size has a thickness of 0.004 caliper (0.1 mm).
It's about 900,000 times as heavy as a Die (Dice)
In other words, 3,750,000 grams is 910,000 times the weight of a Die (Dice), and the weight of a Die (Dice) is 0.00000110 times that amount.(for six-sided, 16 mm, rounded cube)
A die, of the size most commonly used in board games and casinos, typically weight 4.1 g. The use of dice and dice-like tools predates written history, with the oldest known examples belonging to a 5,000-year old backgammon set uncovered during an archaeological dig in modern-day Iran.
It's about 1,500,000 times as heavy as a Penny
In other words, the weight of a Penny is 0.000000670 times 3,750,000 grams.(United States) (formally one-cent coin) (Union shield design, 2010-present)
The weight of a United States penny is 2.5 g. According to a 2010 report by the United States Mint, the cost of manufacturing and distributing a penny is $0.0179 — more than its face-value.
It's about 0.0000007 times as heavy as The Great Pyramid of Giza
In other words, 3,750,000 grams is 0.000000640 times the weight of The Great Pyramid of Giza, and the weight of The Great Pyramid of Giza is 1,600,000 times that amount.(a.k.a. Pyramid of Khufu, a.k.a. Pyramid of Cheops) (Cairo, Egypt)
The Great Pyramid of Giza has an estimated mass of 5,900,000,000,000 grams. The 2,300,000 stones used in the construction of the pyramid weighed an average 2,300,000 grams and were quarried from distances of up to 805 km (500 mi) away.
It's about 2,000,000 times as heavy as a Playing Card
In other words, 3,750,000 grams is 2,100,000 times the weight of a Playing Card, and the weight of a Playing Card is 0.000000480 times that amount.(ISO 216 B8 size, 2.5" x 3.5")
A single ISO 216 B8-size playing card weighs 1.8 g. Although this size is the most common home playing card, many casinos use "bridge size" cards — 2,640 sq. mm (4.036 sq. in) smaller in area.