686466065 has 4 divisors (see below), whose sum is σ = 823759284. Its totient is φ = 549172848.

The previous prime is 686466049. The next prime is 686466089. The reversal of 686466065 is 560664686.

686466065 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560664686 = 2 ⋅280332343.

It can be written as a sum of positive squares in 2 ways, for example, as 520159249 + 166306816 = 22807^2 + 12896^2 .

It is a cyclic number.

It is not a de Polignac number, because 686466065 - 2⁴ = 686466049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68646602 + ... + 68646611.

It is an arithmetic number, because the mean of its divisors is an integer number (205939821).

Almost surely, 2^686466065 is an apocalyptic number.

It is an amenable number.

686466065 is a deficient number, since it is larger than the sum of its proper divisors (137293219).

686466065 is a wasteful number, since it uses less digits than its factorization.

686466065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137293218.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The square root of 686466065 is about 26200.4974189423. The cubic root of 686466065 is about 882.1444193390.

The spelling of 686466065 in words is "six hundred eighty-six million, four hundred sixty-six thousand, sixty-five".