2684664684 has 144 divisors (see below), whose sum is σ = 7802016768. Its totient is φ = 771047424.

The previous prime is 2684664683. The next prime is 2684664691. The reversal of 2684664684 is 4864664862.

2684664684 is a `hidden beast` number, since 2 + 68 + 466 + 46 + 84 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2684664684.

It is not an unprimeable number, because it can be changed into a prime (2684664683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1009084 + ... + 1011740.

It is an arithmetic number, because the mean of its divisors is an integer number (54180672).

Almost surely, 2^2684664684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2684664684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3901008384).

2684664684 is an abundant number, since it is smaller than the sum of its proper divisors (5117352084).

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

2684664684 is a wasteful number, since it uses less digits than its factorization.

2684664684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824 (or 2819 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 54.

The square root of 2684664684 is about 51813.7499511471. The cubic root of 2684664684 is about 1389.8353382229.

The spelling of 2684664684 in words is "two billion, six hundred eighty-four million, six hundred sixty-four thousand, six hundred eighty-four".