686466 has 24 divisors (see below), whose sum is σ = 1623024. Its totient is φ = 207960.

The previous prime is 686453. The next prime is 686473. The reversal of 686466 is 664686.

686466 is a `hidden beast` number, since 6 + 8 + 646 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 686466.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1536 + ... + 1931.

It is an arithmetic number, because the mean of its divisors is an integer number (67626).

2⁶⁸⁶⁴⁶⁶ is an apocalyptic number.

686466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

686466 is an abundant number, since it is smaller than the sum of its proper divisors (936558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686466 is a wasteful number, since it uses less digits than its factorization.

686466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486 (or 3483 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 686466 is about 828.5324375062. The cubic root of 686466 is about 88.2144391496.

The spelling of 686466 in words is "six hundred eighty-six thousand, four hundred sixty-six".