74666

Appears in sequences

• Composite and even n such that phi(n) * sigma(n) is one less than a square.at n=28A015721
• Number of partitions of n having no parts with multiplicity 5.at n=45A184640
• Composite numbers k such that phi(k) * psi(k) + 1 is a perfect square, where phi is the Euler totient function (A000010) and psi is the Dedekind psi function (A001615).at n=43A309653