39666

39666 is a natural number that falls between 39665 and 39667. It is even and composite, with a prime factorization of 2 × 3 × 11 × 601. Because it has four distinct prime factors, 39666 is square-free and has exactly 16 positive divisors: 1, 2, 3, 6, 11, 22, 33, 66, 601, 1202, 1803, 3606, 6611, 13222, 19833, and 39666. The number is also a multiple of 6 and of 66, since 39666 = 6 × 6611 = 66 × 601.

In numeric contexts, 39666 may be used as a five-digit identifier or code, such as a postal code in systems that assign five-digit codes, or as a catalog, inventory, or database index. There is no widely recognized mathematical constant, theorem, or cultural reference uniquely associated with 39666.

As an integer in base-10 notation, 39666 is part of the set of integers that are the product of four distinct primes, a property that informs its divisor structure and modular behavior. Beyond its basic arithmetic properties, the number does not have documented special significance in commonly cited mathematical or historical sources.