2668043918 has 16 divisors (see below), whose sum is σ = 4018356864. Its totient is φ = 1328603640.

The previous prime is 2668043909. The next prime is 2668043921. The reversal of 2668043918 is 8193408662.

It is a congruent number.

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, 534671 + ... + 539637.

It is an arithmetic number, because the mean of its divisors is an integer number (251147304).

Almost surely, 2^2668043918 is an apocalyptic number.

2668043918 is a deficient number, since it is larger than the sum of its proper divisors (1350312946).

2668043918 is a wasteful number, since it uses less digits than its factorization.

2668043918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6007.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 2668043918 is about 51653.1114067681. Note that the first 3 decimals coincide. The cubic root of 2668043918 is about 1386.9612407985.

The spelling of 2668043918 in words is "two billion, six hundred sixty-eight million, forty-three thousand, nine hundred eighteen".