3806661 has 16 divisors (see below), whose sum is σ = 5423616. Its totient is φ = 2369136.

The previous prime is 3806659. The next prime is 3806683. The reversal of 3806661 is 1666083.

3806661 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 3806661 - 2¹ = 3806659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3806641) 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 15 ways as a sum of consecutive naturals, for example, 2326 + ... + 3608.

It is an arithmetic number, because the mean of its divisors is an integer number (338976).

Almost surely, 2^3806661 is an apocalyptic number.

It is an amenable number.

3806661 is a deficient number, since it is larger than the sum of its proper divisors (1616955).

3806661 is a wasteful number, since it uses less digits than its factorization.

3806661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 3806661 is about 1951.0666313583. The cubic root of 3806661 is about 156.1402010476.

The spelling of 3806661 in words is "three million, eight hundred six thousand, six hundred sixty-one".