2766805891 has 2 divisors, whose sum is σ = 2766805892. Its totient is φ = 2766805890.

The previous prime is 2766805843. The next prime is 2766805927. The reversal of 2766805891 is 1985086672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2766805891 - 2⁷ = 2766805763 is a prime.

It is not a weakly prime, because it can be changed into another prime (2766802891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1383402945 + 1383402946.

It is an arithmetic number, because the mean of its divisors is an integer number (1383402946).

Almost surely, 2^2766805891 is an apocalyptic number.

2766805891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2766805891 is an equidigital number, since it uses as much as digits as its factorization.

2766805891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 2766805891 is about 52600.4362244269. The cubic root of 2766805891 is about 1403.8678571084.

The spelling of 2766805891 in words is "two billion, seven hundred sixty-six million, eight hundred five thousand, eight hundred ninety-one".