2665085556 has 96 divisors (see below), whose sum is σ = 7279534080. Its totient is φ = 743053824.

The previous prime is 2665085477. The next prime is 2665085557. The reversal of 2665085556 is 6555805662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665085557) 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, 1708705 + ... + 1710263.

It is an arithmetic number, because the mean of its divisors is an integer number (75828480).

Almost surely, 2^2665085556 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 2665085556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3639767040).

2665085556 is an abundant number, since it is smaller than the sum of its proper divisors (4614448524).

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

2665085556 is a wasteful number, since it uses less digits than its factorization.

2665085556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053 (or 2051 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 48.

The square root of 2665085556 is about 51624.4666413126. The cubic root of 2665085556 is about 1386.4484242898.

The spelling of 2665085556 in words is "two billion, six hundred sixty-five million, eighty-five thousand, five hundred fifty-six".