2208568660 has 24 divisors (see below), whose sum is σ = 4797926280. Its totient is φ = 852964224.

The previous prime is 2208568657. The next prime is 2208568667. The reversal of 2208568660 is 668658022.

It can be written as a sum of positive squares in 4 ways, for example, as 592046224 + 1616522436 = 24332^2 + 40206^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2208568667) 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, 1903359 + ... + 1904518.

It is an arithmetic number, because the mean of its divisors is an integer number (199913595).

Almost surely, 2^2208568660 is an apocalyptic number.

2208568660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2208568660 is an abundant number, since it is smaller than the sum of its proper divisors (2589357620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2208568660 is a wasteful number, since it uses less digits than its factorization.

2208568660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807915 (or 3807913 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 2208568660 is about 46995.4110525698. The cubic root of 2208568660 is about 1302.2777936176.

The spelling of 2208568660 in words is "two billion, two hundred eight million, five hundred sixty-eight thousand, six hundred sixty".