2665903128 has 128 divisors (see below), whose sum is σ = 7710474240. Its totient is φ = 752400000.

The previous prime is 2665903117. The next prime is 2665903153. The reversal of 2665903128 is 8213095662.

2665903128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 2665903128.

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, 8053923 + ... + 8054253.

It is an arithmetic number, because the mean of its divisors is an integer number (60238080).

Almost surely, 2^2665903128 is an apocalyptic number.

2665903128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2665903128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3855237120).

2665903128 is an abundant number, since it is smaller than the sum of its proper divisors (5044571112).

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

2665903128 is a wasteful number, since it uses less digits than its factorization.

2665903128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 2665903128 is about 51632.3844888070. The cubic root of 2665903128 is about 1386.5901840315.

The spelling of 2665903128 in words is "two billion, six hundred sixty-five million, nine hundred three thousand, one hundred twenty-eight".