3975666 has 16 divisors (see below), whose sum is σ = 8025600. Its totient is φ = 1312848.

The previous prime is 3975661. The next prime is 3975667. The reversal of 3975666 is 6665793.

It is a d-powerful number, because it can be written as 3⁵ + 9⁵ + 7⁴ + 5⁹ + 6⁴ + 6⁷ + 6⁸ .

It is not an unprimeable number, because it can be changed into a prime (3975661) by changing a digit.

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, 2386 + ... + 3693.

It is an arithmetic number, because the mean of its divisors is an integer number (501600).

Almost surely, 2^3975666 is an apocalyptic number.

3975666 is an abundant number, since it is smaller than the sum of its proper divisors (4049934).

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

3975666 is a wasteful number, since it uses less digits than its factorization.

3975666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193.

The product of its digits is 204120, while the sum is 42.

The square root of 3975666 is about 1993.9072195065. The cubic root of 3975666 is about 158.4175517486.

The spelling of 3975666 in words is "three million, nine hundred seventy-five thousand, six hundred sixty-six".