3988666 has 8 divisors (see below), whose sum is σ = 6526944. Its totient is φ = 1813020.

The previous prime is 3988661. The next prime is 3988667. The reversal of 3988666 is 6668893.

It is a happy number.

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 (3988661) 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, 90630 + ... + 90673.

It is an arithmetic number, because the mean of its divisors is an integer number (815868).

Almost surely, 2^3988666 is an apocalyptic number.

3988666 is a deficient number, since it is larger than the sum of its proper divisors (2538278).

3988666 is a wasteful number, since it uses less digits than its factorization.

3988666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181316.

The product of its digits is 373248, while the sum is 46.

The square root of 3988666 is about 1997.1644899707. The cubic root of 3988666 is about 158.5900333352.

The spelling of 3988666 in words is "three million, nine hundred eighty-eight thousand, six hundred sixty-six".