2208661 has 12 divisors (see below), whose sum is σ = 2734752. Its totient is φ = 1746576.

The previous prime is 2208659. The next prime is 2208683. The reversal of 2208661 is 1668022.

2208661 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 2208661 - 2¹ = 2208659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2208601) 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 11 ways as a sum of consecutive naturals, for example, 250 + ... + 2116.

It is an arithmetic number, because the mean of its divisors is an integer number (227896).

2^2208661 is an apocalyptic number.

It is an amenable number.

2208661 is a deficient number, since it is larger than the sum of its proper divisors (526091).

2208661 is a wasteful number, since it uses less digits than its factorization.

2208661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2208661 is about 1486.1564520601. The cubic root of 2208661 is about 130.2295942726.

The spelling of 2208661 in words is "two million, two hundred eight thousand, six hundred sixty-one".