It is a sphenic number, since it is the product of 3 distinct primes.
3966 is an admirable number.
It is a Curzon number.
It is a plaindrome in base 12.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 3966.
23966 is an apocalyptic number.
3966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3966 is a wasteful number, since it uses less digits than its factorization.
3966 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 666.
The square root of 3966 is about 62.9761859753. The cubic root of 3966 is about 15.8289061183.
The spelling of 3966 in words is "three thousand, nine hundred sixty-six".