2668938291 has 12 divisors (see below), whose sum is σ = 3903933280. Its totient is φ = 1756769040.

The previous prime is 2668938277. The next prime is 2668938301. The reversal of 2668938291 is 1928398662.

2668938291 is a `hidden beast` number, since 266 + 8 + 93 + 8 + 291 = 666.

It is not a de Polignac number, because 2668938291 - 2¹⁴ = 2668921907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2668938221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1876180 + ... + 1877601.

Almost surely, 2^2668938291 is an apocalyptic number.

2668938291 is a deficient number, since it is larger than the sum of its proper divisors (1234994989).

2668938291 is a wasteful number, since it uses less digits than its factorization.

2668938291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753866 (or 3753863 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 2668938291 is about 51661.7681753151. The cubic root of 2668938291 is about 1387.1162010293.

It can be divided in two parts, 26689 and 38291, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 2668938291 in words is "two billion, six hundred sixty-eight million, nine hundred thirty-eight thousand, two hundred ninety-one".