The number 70 is notable in mathematics for being the smallest weird number. Here are the key facts about 70:
Weird Number: It is an abundant number (the sum of its proper divisors is greater than the number itself) that is not semi-perfect (none of its subsets of proper divisors sum up to 70).
Mathematics: 70 is a composite number, a Pell number, and an Erdős–Woods number.
Cannonball Problem: Along with 24, 70 is part of the only non-trivial solution pair to the cannonball problem.
Significance: In religious and historical contexts, 70 is often used as a number representing a large, complete, or infinite amount.
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