2660813539 has 4 divisors (see below), whose sum is σ = 2752565760. Its totient is φ = 2569061320.

The previous prime is 2660813527. The next prime is 2660813563. The reversal of 2660813539 is 9353180662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2660813539 - 2⁹ = 2660813027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2660813495 and 2660813504.

It is not an unprimeable number, because it can be changed into a prime (2660813569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45876067 + ... + 45876124.

It is an arithmetic number, because the mean of its divisors is an integer number (688141440).

Almost surely, 2^2660813539 is an apocalyptic number.

2660813539 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2660813539 is a deficient number, since it is larger than the sum of its proper divisors (91752221).

2660813539 is an equidigital number, since it uses as much as digits as its factorization.

2660813539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91752220.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 2660813539 is about 51583.0741522837. The cubic root of 2660813539 is about 1385.7072224698.

The spelling of 2660813539 in words is "two billion, six hundred sixty million, eight hundred thirteen thousand, five hundred thirty-nine".