3686566 has 16 divisors (see below), whose sum is σ = 5997600. Its totient is φ = 1699464.

The previous prime is 3686561. The next prime is 3686587. The reversal of 3686566 is 6656863.

It is a d-powerful number, because it can be written as 3⁶ + 6⁶ + 8 + 6⁷ + 5 + 6⁸ + 6⁸ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3975 + ... + 4813.

It is an arithmetic number, because the mean of its divisors is an integer number (374850).

Almost surely, 2^3686566 is an apocalyptic number.

3686566 is a deficient number, since it is larger than the sum of its proper divisors (2311034).

3686566 is an equidigital number, since it uses as much as digits as its factorization.

3686566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 854 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 3686566 is about 1920.0432286800. The cubic root of 3686566 is about 154.4806202411.

The spelling of 3686566 in words is "three million, six hundred eighty-six thousand, five hundred sixty-six".