686507055 has 16 divisors (see below), whose sum is σ = 1182904800. Its totient is φ = 337972608.

The previous prime is 686507047. The next prime is 686507071. The reversal of 686507055 is 550705686.

686507055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 686507055 - 2³ = 686507047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686506998 and 686507016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1760080 + ... + 1760469.

It is an arithmetic number, because the mean of its divisors is an integer number (73931550).

Almost surely, 2^686507055 is an apocalyptic number.

686507055 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

686507055 is a deficient number, since it is larger than the sum of its proper divisors (496397745).

686507055 is a wasteful number, since it uses less digits than its factorization.

686507055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520570.

The product of its (nonzero) digits is 252000, while the sum is 42.

The square root of 686507055 is about 26201.2796443227. The cubic root of 686507055 is about 882.1619770799.

The spelling of 686507055 in words is "six hundred eighty-six million, five hundred seven thousand, fifty-five".