686560111 has 4 divisors (see below), whose sum is σ = 686722752. Its totient is φ = 686397472.

The previous prime is 686560103. The next prime is 686560159. The reversal of 686560111 is 111065686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111065686 = 2 ⋅55532843.

It is a cyclic number.

It is not a de Polignac number, because 686560111 - 2³ = 686560103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686530111) 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, 74815 + ... + 83488.

It is an arithmetic number, because the mean of its divisors is an integer number (171680688).

Almost surely, 2^686560111 is an apocalyptic number.

686560111 is a deficient number, since it is larger than the sum of its proper divisors (162641).

686560111 is a wasteful number, since it uses less digits than its factorization.

686560111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162640.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 686560111 is about 26202.2920943951. The cubic root of 686560111 is about 882.1847021584.

The spelling of 686560111 in words is "six hundred eighty-six million, five hundred sixty thousand, one hundred eleven".