3966664 has 32 divisors (see below), whose sum is σ = 8205120. Its totient is φ = 1786176.

The previous prime is 3966631. The next prime is 3966689. The reversal of 3966664 is 4666693.

3966664 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4029 + ... + 4915.

It is an arithmetic number, because the mean of its divisors is an integer number (256410).

Almost surely, 2^3966664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3966664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4102560).

3966664 is an abundant number, since it is smaller than the sum of its proper divisors (4238456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3966664 is a wasteful number, since it uses less digits than its factorization.

3966664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 945 counting only the distinct ones).

The product of its digits is 139968, while the sum is 40.

The square root of 3966664 is about 1991.6485633766. The cubic root of 3966664 is about 158.2978944385.

The spelling of 3966664 in words is "three million, nine hundred sixty-six thousand, six hundred sixty-four".