3864666 has 16 divisors (see below), whose sum is σ = 8324064. Its totient is φ = 1189104.

The previous prime is 3864643. The next prime is 3864671. The reversal of 3864666 is 6664683.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24696 + ... + 24851.

It is an arithmetic number, because the mean of its divisors is an integer number (520254).

Almost surely, 2^3864666 is an apocalyptic number.

3864666 is an abundant number, since it is smaller than the sum of its proper divisors (4459398).

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

3864666 is a wasteful number, since it uses less digits than its factorization.

3864666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49565.

The product of its digits is 124416, while the sum is 39.

The square root of 3864666 is about 1965.8753775354. The cubic root of 3864666 is about 156.9292823900.

The spelling of 3864666 in words is "three million, eight hundred sixty-four thousand, six hundred sixty-six".