2866691081 has 2 divisors, whose sum is σ = 2866691082. Its totient is φ = 2866691080.

The previous prime is 2866691077. The next prime is 2866691099. The reversal of 2866691081 is 1801966682.

2866691081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2863855225 + 2835856 = 53515^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 2866691081 - 2² = 2866691077 is a prime.

It is a super-2 number, since 2×2866691081² = 16435835507769897122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2866691021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1433345540 + 1433345541.

It is an arithmetic number, because the mean of its divisors is an integer number (1433345541).

Almost surely, 2^2866691081 is an apocalyptic number.

It is an amenable number.

2866691081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2866691081 is an equidigital number, since it uses as much as digits as its factorization.

2866691081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 2866691081 is about 53541.4893423782. The cubic root of 2866691081 is about 1420.5623443889.

The spelling of 2866691081 in words is "two billion, eight hundred sixty-six million, six hundred ninety-one thousand, eighty-one".