2660260111581 has 8 divisors (see below), whose sum is σ = 3558567273184. Its totient is φ = 1767729845520.

The previous prime is 2660260111573. The next prime is 2660260111609. The reversal of 2660260111581 is 1851110620662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2660260111581 - 2³ = 2660260111573 is a prime.

It is a super-2 number, since 2×2660260111581² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660260111511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444222810 + ... + 1444224651.

It is an arithmetic number, because the mean of its divisors is an integer number (444820909148).

Almost surely, 2^{2660260111581} is an apocalyptic number.

It is an amenable number.

2660260111581 is a deficient number, since it is larger than the sum of its proper divisors (898307161603).

2660260111581 is a wasteful number, since it uses less digits than its factorization.

2660260111581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888447771.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 2660260111581 in words is "two trillion, six hundred sixty billion, two hundred sixty million, one hundred eleven thousand, five hundred eighty-one".