2665128326 has 24 divisors (see below), whose sum is σ = 4749329376. Its totient is φ = 1117893840.

The previous prime is 2665128269. The next prime is 2665128329. The reversal of 2665128326 is 6238215662.

It is a happy number.

2665128326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665128329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284705 + ... + 293916.

It is an arithmetic number, because the mean of its divisors is an integer number (197888724).

Almost surely, 2^2665128326 is an apocalyptic number.

2665128326 is a deficient number, since it is larger than the sum of its proper divisors (2084201050).

2665128326 is a wasteful number, since it uses less digits than its factorization.

2665128326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578684 (or 578677 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 2665128326 is about 51624.8808812185. The cubic root of 2665128326 is about 1386.4558409475.

The spelling of 2665128326 in words is "two billion, six hundred sixty-five million, one hundred twenty-eight thousand, three hundred twenty-six".