2665252335640 has 64 divisors (see below), whose sum is σ = 6105171029760. Its totient is φ = 1046895736320.

The previous prime is 2665252335589. The next prime is 2665252335643. The reversal of 2665252335640 is 465332525662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665252335643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581314 + ... + 2380846.

It is an arithmetic number, because the mean of its divisors is an integer number (95393297340).

Almost surely, 2^{2665252335640} is an apocalyptic number.

2665252335640 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 2665252335640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3052585514880).

2665252335640 is an abundant number, since it is smaller than the sum of its proper divisors (3439918694120).

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

2665252335640 is a wasteful number, since it uses less digits than its factorization.

2665252335640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800212 (or 1800208 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 49.

The spelling of 2665252335640 in words is "two trillion, six hundred sixty-five billion, two hundred fifty-two million, three hundred thirty-five thousand, six hundred forty".