3966656 has 14 divisors (see below), whose sum is σ = 7871460. Its totient is φ = 1983296.

The previous prime is 3966631. The next prime is 3966689. The reversal of 3966656 is 6566693.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30926 + ... + 31053.

Almost surely, 2^3966656 is an apocalyptic number.

It is an amenable number.

3966656 is a deficient number, since it is larger than the sum of its proper divisors (3904804).

3966656 is an equidigital number, since it uses as much as digits as its factorization.

3966656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61991 (or 61981 counting only the distinct ones).

The product of its digits is 174960, while the sum is 41.

The square root of 3966656 is about 1991.6465549891. The cubic root of 3966656 is about 158.2977880196.

The spelling of 3966656 in words is "three million, nine hundred sixty-six thousand, six hundred fifty-six".