686424006065 has 24 divisors (see below), whose sum is σ = 968070178152. Its totient is φ = 465838248960.

The previous prime is 686424006061. The next prime is 686424006067. The reversal of 686424006065 is 560600424686.

It can be written as a sum of positive squares in 4 ways, for example, as 31709993329 + 654714012736 = 178073^2 + 809144^2 .

It is not a de Polignac number, because 686424006065 - 2² = 686424006061 is a prime.

It is a super-2 number, since 2×686424006065² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686424006061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14418146 + ... + 14465675.

It is an arithmetic number, because the mean of its divisors is an integer number (40336257423).

Almost surely, 2^686424006065 is an apocalyptic number.

It is an amenable number.

686424006065 is a deficient number, since it is larger than the sum of its proper divisors (281646172087).

686424006065 is a wasteful number, since it uses less digits than its factorization.

686424006065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28883937 (or 28883930 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 686424006065 in words is "six hundred eighty-six billion, four hundred twenty-four million, six thousand, sixty-five".