65560661111 has 4 divisors (see below), whose sum is σ = 71520721224. Its totient is φ = 59600601000.

The previous prime is 65560661093. The next prime is 65560661129. The reversal of 65560661111 is 11116606556.

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

It is an interprime number because it is at equal distance from previous prime (65560661093) and next prime (65560661129).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65560661111 is a prime.

It is a super-2 number, since 2×65560661111² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65560661161) 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, 2980030040 + ... + 2980030061.

It is an arithmetic number, because the mean of its divisors is an integer number (17880180306).

Almost surely, 2^65560661111 is an apocalyptic number.

65560661111 is a deficient number, since it is larger than the sum of its proper divisors (5960060113).

65560661111 is a wasteful number, since it uses less digits than its factorization.

65560661111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960060112.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 65560661111 in words is "sixty-five billion, five hundred sixty million, six hundred sixty-one thousand, one hundred eleven".