2006643768 has 16 divisors (see below), whose sum is σ = 5016609480. Its totient is φ = 668881248.

The previous prime is 2006643703. The next prime is 2006643787. The reversal of 2006643768 is 8673466002.

It is a congruent number.

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, 41805055 + ... + 41805102.

Almost surely, 2^2006643768 is an apocalyptic number.

It is an amenable number.

2006643768 is an abundant number, since it is smaller than the sum of its proper divisors (3009965712).

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

2006643768 is a wasteful number, since it uses less digits than its factorization.

2006643768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83610166 (or 83610162 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 2006643768 is about 44795.5775495751. The cubic root of 2006643768 is about 1261.3146118074.

The spelling of 2006643768 in words is "two billion, six million, six hundred forty-three thousand, seven hundred sixty-eight".