13665760557 has 8 divisors (see below), whose sum is σ = 18236685984. Its totient is φ = 9102671088.

The previous prime is 13665760547. The next prime is 13665760609. The reversal of 13665760557 is 75506756631.

It is a happy number.

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

It is not a de Polignac number, because 13665760557 - 2²⁰ = 13664711981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13665760517) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1954918 + ... + 1961895.

It is an arithmetic number, because the mean of its divisors is an integer number (2279585748).

Almost surely, 2^13665760557 is an apocalyptic number.

It is an amenable number.

13665760557 is a deficient number, since it is larger than the sum of its proper divisors (4570925427).

13665760557 is a wasteful number, since it uses less digits than its factorization.

13665760557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3917979.

The product of its (nonzero) digits is 3969000, while the sum is 51.

The spelling of 13665760557 in words is "thirteen billion, six hundred sixty-five million, seven hundred sixty thousand, five hundred fifty-seven".