3963666 has 32 divisors (see below), whose sum is σ = 9538560. Its totient is φ = 1072656.

The previous prime is 3963649. The next prime is 3963683. The reversal of 3963666 is 6663693.

It is an interprime number because it is at equal distance from previous prime (3963649) and next prime (3963683).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1686 + ... + 3281.

It is an arithmetic number, because the mean of its divisors is an integer number (298080).

Almost surely, 2^3963666 is an apocalyptic number.

3963666 is an abundant number, since it is smaller than the sum of its proper divisors (5574894).

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

3963666 is a wasteful number, since it uses less digits than its factorization.

3963666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998.

The product of its digits is 104976, while the sum is 39.

The square root of 3963666 is about 1990.8957782867. The cubic root of 3963666 is about 158.2580039327.

The spelling of 3963666 in words is "three million, nine hundred sixty-three thousand, six hundred sixty-six".