2665345320 has 192 divisors, whose sum is σ = 9705795840. Its totient is φ = 628646400.

The previous prime is 2665345313. The next prime is 2665345337. The reversal of 2665345320 is 235435662.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137425 + ... + 155615.

It is an arithmetic number, because the mean of its divisors is an integer number (50551020).

Almost surely, 2^2665345320 is an apocalyptic number.

2665345320 is a gapful number since it is divisible by the number (20) 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 2665345320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4852897920).

2665345320 is an abundant number, since it is smaller than the sum of its proper divisors (7040450520).

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

2665345320 is a wasteful number, since it uses less digits than its factorization.

2665345320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18256 (or 18249 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The square root of 2665345320 is about 51626.9824800947. The cubic root of 2665345320 is about 1386.4934682081.

The spelling of 2665345320 in words is "two billion, six hundred sixty-five million, three hundred forty-five thousand, three hundred twenty".