66560615113 has 4 divisors (see below), whose sum is σ = 66562399360. Its totient is φ = 66558830868.

The previous prime is 66560615089. The next prime is 66560615123. The reversal of 66560615113 is 31151606566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31151606566 = 2 ⋅15575803283.

It is a cyclic number.

It is not a de Polignac number, because 66560615113 - 2²⁵ = 66527060681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66560615123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834945 + ... + 911182.

It is an arithmetic number, because the mean of its divisors is an integer number (16640599840).

Almost surely, 2^66560615113 is an apocalyptic number.

It is an amenable number.

66560615113 is a deficient number, since it is larger than the sum of its proper divisors (1784247).

66560615113 is a wasteful number, since it uses less digits than its factorization.

66560615113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784246.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 66560615113 in words is "sixty-six billion, five hundred sixty million, six hundred fifteen thousand, one hundred thirteen".