753

753 = 3 x 251.

753 is a divisor of 20¹⁰ - 1.

753 is the smallest composite number that you can get by concatenating all odd primes up to some number in decreasing order.

753 is the smallest number whose cube contains four consecutive sevens: 753³ = 426957777.

753 is 353 in base 15.

Source: Number Gossip