3566661 has 24 divisors (see below), whose sum is σ = 5827680. Its totient is φ = 1929312.

The previous prime is 3566659. The next prime is 3566669. The reversal of 3566661 is 1666653.

3566661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3566661 - 2¹ = 3566659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3566669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2155 + ... + 3431.

It is an arithmetic number, because the mean of its divisors is an integer number (242820).

Almost surely, 2^3566661 is an apocalyptic number.

It is an amenable number.

3566661 is a deficient number, since it is larger than the sum of its proper divisors (2261019).

3566661 is a wasteful number, since it uses less digits than its factorization.

3566661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313 (or 1306 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 3566661 is about 1888.5605629685. The cubic root of 3566661 is about 152.7873075219.

The spelling of 3566661 in words is "three million, five hundred sixty-six thousand, six hundred sixty-one".