2668319218 has 16 divisors (see below), whose sum is σ = 4307396184. Its totient is φ = 1235093760.

The previous prime is 2668319209. The next prime is 2668319233. The reversal of 2668319218 is 8129138662.

It can be written as a sum of positive squares in 4 ways, for example, as 2529385849 + 138933369 = 50293^2 + 11787^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641205 + ... + 645352.

Almost surely, 2^2668319218 is an apocalyptic number.

2668319218 is a deficient number, since it is larger than the sum of its proper divisors (1639076966).

2668319218 is a wasteful number, since it uses less digits than its factorization.

2668319218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286637.

The product of its digits is 248832, while the sum is 46.

The square root of 2668319218 is about 51655.7762307373. The cubic root of 2668319218 is about 1387.0089433238.

The spelling of 2668319218 in words is "two billion, six hundred sixty-eight million, three hundred nineteen thousand, two hundred eighteen".