2660813538 has 16 divisors (see below), whose sum is σ = 5434853760. Its totient is φ = 868066736.

The previous prime is 2660813527. The next prime is 2660813563. The reversal of 2660813538 is 8353180662.

2660813538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2660813538.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4717473 + ... + 4718036.

It is an arithmetic number, because the mean of its divisors is an integer number (339678360).

Almost surely, 2^2660813538 is an apocalyptic number.

2660813538 is an abundant number, since it is smaller than the sum of its proper divisors (2774040222).

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

2660813538 is a wasteful number, since it uses less digits than its factorization.

2660813538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9435561.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 2660813538 is about 51583.0741425906. The cubic root of 2660813538 is about 1385.7072222962.

The spelling of 2660813538 in words is "two billion, six hundred sixty million, eight hundred thirteen thousand, five hundred thirty-eight".