3871729536666 has 16 divisors (see below), whose sum is σ = 7743501159264. Its totient is φ = 1290569497904.

The previous prime is 3871729536613. The next prime is 3871729536679. The reversal of 3871729536666 is 6666359271783.

It is a self number, because there is not a number n which added to its sum of digits gives 3871729536666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487296 + ... + 2825051.

It is an arithmetic number, because the mean of its divisors is an integer number (483968822454).

Almost surely, 2^{3871729536666} is an apocalyptic number.

3871729536666 is an abundant number, since it is smaller than the sum of its proper divisors (3871771622598).

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

3871729536666 is a wasteful number, since it uses less digits than its factorization.

3871729536666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507165.

The product of its digits is 411505920, while the sum is 69.

The spelling of 3871729536666 in words is "three trillion, eight hundred seventy-one billion, seven hundred twenty-nine million, five hundred thirty-six thousand, six hundred sixty-six".