3686666 has 8 divisors (see below), whose sum is σ = 5539044. Its totient is φ = 1840320.

The previous prime is 3686663. The next prime is 3686677. The reversal of 3686666 is 6666863.

It can be written as a sum of positive squares in 2 ways, for example, as 3530641 + 156025 = 1879^2 + 395^2 .

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

3686666 is a modest number, since divided by 6666 gives 368 as remainder.

It is not an unprimeable number, because it can be changed into a prime (3686663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626 + ... + 2786.

Almost surely, 2^3686666 is an apocalyptic number.

3686666 is a deficient number, since it is larger than the sum of its proper divisors (1852378).

3686666 is a wasteful number, since it uses less digits than its factorization.

3686666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016.

The product of its digits is 186624, while the sum is 41.

The square root of 3686666 is about 1920.0692695838. The cubic root of 3686666 is about 154.4820170172.

The spelling of 3686666 in words is "three million, six hundred eighty-six thousand, six hundred sixty-six".