2681606668 has 48 divisors (see below), whose sum is σ = 5183196480. Its totient is φ = 1206374400.

The previous prime is 2681606663. The next prime is 2681606677. The reversal of 2681606668 is 8666061862.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2681606663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324508 + ... + 332668.

It is an arithmetic number, because the mean of its divisors is an integer number (107983260).

Almost surely, 2^2681606668 is an apocalyptic number.

It is an amenable number.

2681606668 is a deficient number, since it is larger than the sum of its proper divisors (2501589812).

2681606668 is a wasteful number, since it uses less digits than its factorization.

2681606668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8338 (or 8336 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 2681606668 is about 51784.2318471559. The cubic root of 2681606668 is about 1389.3074320152.

The spelling of 2681606668 in words is "two billion, six hundred eighty-one million, six hundred six thousand, six hundred sixty-eight".