2001836866686 has 8 divisors (see below), whose sum is σ = 4003673733384. Its totient is φ = 667278955560.

The previous prime is 2001836866643. The next prime is 2001836866741. The reversal of 2001836866686 is 6866686381002.

It is a happy number.

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

2001836866686 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166819738885 + ... + 166819738896.

It is an arithmetic number, because the mean of its divisors is an integer number (500459216673).

Almost surely, 2^{2001836866686} is an apocalyptic number.

2001836866686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2001836866686 is a wasteful number, since it uses less digits than its factorization.

2001836866686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333639477786.

The product of its (nonzero) digits is 23887872, while the sum is 60.

The spelling of 2001836866686 in words is "two trillion, one billion, eight hundred thirty-six million, eight hundred sixty-six thousand, six hundred eighty-six".