4006664 has 16 divisors (see below), whose sum is σ = 7560000. Its totient is φ = 1990672.

The previous prime is 4006661. The next prime is 4006687. The reversal of 4006664 is 4666004.

It is not an unprimeable number, because it can be changed into a prime (4006661) 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, 164 + ... + 2835.

It is an arithmetic number, because the mean of its divisors is an integer number (472500).

Almost surely, 2^4006664 is an apocalyptic number.

It is an amenable number.

4006664 is a deficient number, since it is larger than the sum of its proper divisors (3553336).

4006664 is a wasteful number, since it uses less digits than its factorization.

4006664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172 (or 3168 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 4006664 is about 2001.6653066884. The cubic root of 4006664 is about 158.8282099592.

The spelling of 4006664 in words is "four million, six thousand, six hundred sixty-four".