686610616 has 8 divisors (see below), whose sum is σ = 1287394920. Its totient is φ = 343305304.

The previous prime is 686610521. The next prime is 686610623. The reversal of 686610616 is 616016686.

686610616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42913156 + ... + 42913171.

It is an arithmetic number, because the mean of its divisors is an integer number (160924365).

Almost surely, 2^686610616 is an apocalyptic number.

It is an amenable number.

686610616 is a deficient number, since it is larger than the sum of its proper divisors (600784304).

686610616 is a wasteful number, since it uses less digits than its factorization.

686610616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85826333 (or 85826329 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 686610616 is about 26203.2558282363. The cubic root of 686610616 is about 882.2063334986.

The spelling of 686610616 in words is "six hundred eighty-six million, six hundred ten thousand, six hundred sixteen".