2646840866 has 8 divisors (see below), whose sum is σ = 4179222480. Its totient is φ = 1253766708.

The previous prime is 2646840811. The next prime is 2646840881. The reversal of 2646840866 is 6680486462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34826816 + ... + 34826891.

It is an arithmetic number, because the mean of its divisors is an integer number (522402810).

Almost surely, 2^2646840866 is an apocalyptic number.

2646840866 is a deficient number, since it is larger than the sum of its proper divisors (1532381614).

2646840866 is a wasteful number, since it uses less digits than its factorization.

2646840866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69653728.

The product of its (nonzero) digits is 2654208, while the sum is 50.

The square root of 2646840866 is about 51447.4573327001. The cubic root of 2646840866 is about 1383.2773860504.

The spelling of 2646840866 in words is "two billion, six hundred forty-six million, eight hundred forty thousand, eight hundred sixty-six".