2665617577880 has 16 divisors (see below), whose sum is σ = 5997639550320. Its totient is φ = 1066247031136.

The previous prime is 2665617577849. The next prime is 2665617577907. The reversal of 2665617577880 is 887757165662.

It is a self number, because there is not a number n which added to its sum of digits gives 2665617577880.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33320219684 + ... + 33320219763.

It is an arithmetic number, because the mean of its divisors is an integer number (374852471895).

Almost surely, 2^{2665617577880} is an apocalyptic number.

2665617577880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2665617577880 is an abundant number, since it is smaller than the sum of its proper divisors (3332021972440).

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

2665617577880 is a wasteful number, since it uses less digits than its factorization.

2665617577880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66640439458 (or 66640439454 counting only the distinct ones).

The product of its (nonzero) digits is 237081600, while the sum is 68.

The spelling of 2665617577880 in words is "two trillion, six hundred sixty-five billion, six hundred seventeen million, five hundred seventy-seven thousand, eight hundred eighty".