33871000660 has 96 divisors (see below), whose sum is σ = 84292104960. Its totient is φ = 11185993728.

The previous prime is 33871000643. The next prime is 33871000673. The reversal of 33871000660 is 6600017833.

It is a super-2 number, since 2×33871000660² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1748347 + ... + 1767613.

It is an arithmetic number, because the mean of its divisors is an integer number (878042760).

Almost surely, 2^33871000660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33871000660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42146052480).

33871000660 is an abundant number, since it is smaller than the sum of its proper divisors (50421104300).

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

33871000660 is a wasteful number, since it uses less digits than its factorization.

33871000660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19745 (or 19743 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 33871000660 in words is "thirty-three billion, eight hundred seventy-one million, six hundred sixty", and thus it is an aban number.