3964666 has 8 divisors (see below), whose sum is σ = 5956020. Its totient is φ = 1979328.

The previous prime is 3964663. The next prime is 3964679. The reversal of 3964666 is 6664693.

It can be written as a sum of positive squares in 2 ways, for example, as 2653641 + 1311025 = 1629^2 + 1145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3964663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 940 + ... + 2968.

Almost surely, 2^3964666 is an apocalyptic number.

3964666 is a deficient number, since it is larger than the sum of its proper divisors (1991354).

3964666 is a wasteful number, since it uses less digits than its factorization.

3964666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008.

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

The square root of 3964666 is about 1991.1469056802. The cubic root of 3964666 is about 158.2713118734.

The spelling of 3964666 in words is "three million, nine hundred sixty-four thousand, six hundred sixty-six".