2866120866 has 48 divisors (see below), whose sum is σ = 7341796800. Its totient is φ = 790653024.

The previous prime is 2866120861. The next prime is 2866120921. The reversal of 2866120866 is 6680216682.

2866120866 is a `hidden beast` number, since 28 + 6 + 612 + 0 + 8 + 6 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (2866120861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388536 + ... + 395843.

It is an arithmetic number, because the mean of its divisors is an integer number (152954100).

Almost surely, 2^2866120866 is an apocalyptic number.

2866120866 is an abundant number, since it is smaller than the sum of its proper divisors (4475675934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2866120866 is a wasteful number, since it uses less digits than its factorization.

2866120866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784423 (or 784420 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 2866120866 is about 53536.1640949368. The cubic root of 2866120866 is about 1420.4681498806.

The spelling of 2866120866 in words is "two billion, eight hundred sixty-six million, one hundred twenty thousand, eight hundred sixty-six".