2001836866687 has 32 divisors (see below), whose sum is σ = 2331972155520. Its totient is φ = 1683110707200.

The previous prime is 2001836866643. The next prime is 2001836866741. The reversal of 2001836866687 is 7866686381002.

It is a cyclic number.

It is not a de Polignac number, because 2001836866687 - 2⁷ = 2001836866559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001836866637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42724389 + ... + 42771217.

It is an arithmetic number, because the mean of its divisors is an integer number (72874129860).

Almost surely, 2^{2001836866687} is an apocalyptic number.

2001836866687 is a deficient number, since it is larger than the sum of its proper divisors (330135288833).

2001836866687 is a wasteful number, since it uses less digits than its factorization.

2001836866687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47491.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 2001836866687 in words is "two trillion, one billion, eight hundred thirty-six million, eight hundred sixty-six thousand, six hundred eighty-seven".