2001868668 has 30 divisors (see below), whose sum is σ = 5233280976. Its totient is φ = 667289448.

The previous prime is 2001868639. The next prime is 2001868787. The reversal of 2001868668 is 8668681002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3088980 + ... + 3089627.

Almost surely, 2^2001868668 is an apocalyptic number.

It is an amenable number.

2001868668 is an abundant number, since it is smaller than the sum of its proper divisors (3231412308).

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

2001868668 is a wasteful number, since it uses less digits than its factorization.

2001868668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6178623 (or 6178612 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 2001868668 is about 44742.2470155445. The cubic root of 2001868668 is about 1260.3133234401.

The spelling of 2001868668 in words is "two billion, one million, eight hundred sixty-eight thousand, six hundred sixty-eight".