2791113866 has 4 divisors (see below), whose sum is σ = 4186670802. Its totient is φ = 1395556932.

The previous prime is 2791113863. The next prime is 2791113887. The reversal of 2791113866 is 6683111972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2598042841 + 193071025 = 50971^2 + 13895^2 .

It is a super-2 number, since 2×2791113866² = 15580633225954931912, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2791113863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697778465 + ... + 697778468.

Almost surely, 2^2791113866 is an apocalyptic number.

2791113866 is a deficient number, since it is larger than the sum of its proper divisors (1395556936).

2791113866 is a wasteful number, since it uses less digits than its factorization.

2791113866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395556935.

The product of its digits is 108864, while the sum is 44.

The square root of 2791113866 is about 52830.9934224220. The cubic root of 2791113866 is about 1407.9671367615.

The spelling of 2791113866 in words is "two billion, seven hundred ninety-one million, one hundred thirteen thousand, eight hundred sixty-six".