2665261116 has 108 divisors (see below), whose sum is σ = 7899510528. Its totient is φ = 755443584.

The previous prime is 2665261097. The next prime is 2665261121. The reversal of 2665261116 is 6111625662.

2665261116 is a `hidden beast` number, since 26 + 6 + 5 + 2 + 611 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 218080 + ... + 229976.

It is an arithmetic number, because the mean of its divisors is an integer number (73143616).

Almost surely, 2^2665261116 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 2665261116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3949755264).

2665261116 is an abundant number, since it is smaller than the sum of its proper divisors (5234249412).

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

2665261116 is a wasteful number, since it uses less digits than its factorization.

2665261116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12048 (or 12036 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 2665261116 is about 51626.1669698613. The cubic root of 2665261116 is about 1386.4788672826.

Adding to 2665261116 its reverse (6111625662), we get a palindrome (8776886778).

The spelling of 2665261116 in words is "two billion, six hundred sixty-five million, two hundred sixty-one thousand, one hundred sixteen".