686674255 has 16 divisors (see below), whose sum is σ = 845847648. Its totient is φ = 534960000.

The previous prime is 686674253. The next prime is 686674259. The reversal of 686674255 is 552476686.

It is a happy number.

It is not a de Polignac number, because 686674255 - 2¹ = 686674253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 686674199 and 686674208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686674253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19660 + ... + 41950.

It is an arithmetic number, because the mean of its divisors is an integer number (52865478).

Almost surely, 2^686674255 is an apocalyptic number.

686674255 is a deficient number, since it is larger than the sum of its proper divisors (159173393).

686674255 is a wasteful number, since it uses less digits than its factorization.

686674255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22458.

The product of its digits is 2419200, while the sum is 49.

The square root of 686674255 is about 26204.4701339294. The cubic root of 686674255 is about 882.2335886333.

The spelling of 686674255 in words is "six hundred eighty-six million, six hundred seventy-four thousand, two hundred fifty-five".