8771897665806 has 64 divisors (see below), whose sum is σ = 19388719595520. Its totient is φ = 2623450883040.

The previous prime is 8771897665801. The next prime is 8771897665829. The reversal of 8771897665806 is 6085667981778.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8771897665801) 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, 12714571 + ... + 13386713.

It is an arithmetic number, because the mean of its divisors is an integer number (302948743680).

Almost surely, 2^{8771897665806} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8771897665806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9694359797760).

8771897665806 is an abundant number, since it is smaller than the sum of its proper divisors (10616821929714).

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

8771897665806 is a wasteful number, since it uses less digits than its factorization.

8771897665806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674741.

The product of its (nonzero) digits is 1706987520, while the sum is 78.

The spelling of 8771897665806 in words is "eight trillion, seven hundred seventy-one billion, eight hundred ninety-seven million, six hundred sixty-five thousand, eight hundred six".