2866804891 has 4 divisors (see below), whose sum is σ = 2874369400. Its totient is φ = 2859240384.

The previous prime is 2866804819. The next prime is 2866804921. The reversal of 2866804891 is 1984086682.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2866804891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2866801891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3781686 + ... + 3782443.

It is an arithmetic number, because the mean of its divisors is an integer number (718592350).

Almost surely, 2^2866804891 is an apocalyptic number.

2866804891 is a deficient number, since it is larger than the sum of its proper divisors (7564509).

2866804891 is an equidigital number, since it uses as much as digits as its factorization.

2866804891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7564508.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The square root of 2866804891 is about 53542.5521524703. The cubic root of 2866804891 is about 1420.5811433056.

The spelling of 2866804891 in words is "two billion, eight hundred sixty-six million, eight hundred four thousand, eight hundred ninety-one".