686366 has 16 divisors (see below), whose sum is σ = 1102464. Its totient is φ = 319704.

The previous prime is 686363. The next prime is 686417. The reversal of 686366 is 663686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1805 + ... + 2151.

It is an arithmetic number, because the mean of its divisors is an integer number (68904).

2⁶⁸⁶³⁶⁶ is an apocalyptic number.

686366 is a deficient number, since it is larger than the sum of its proper divisors (416098).

686366 is a wasteful number, since it uses less digits than its factorization.

686366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415.

The product of its digits is 31104, while the sum is 35.

The square root of 686366 is about 828.4720876409. The cubic root of 686366 is about 88.2101554355.

The spelling of 686366 in words is "six hundred eighty-six thousand, three hundred sixty-six".