686266 has 8 divisors (see below), whose sum is σ = 1176480. Its totient is φ = 294108.

The previous prime is 686209. The next prime is 686267. The reversal of 686266 is 662686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×686266² = 941922045512, which contains 22 as substring.

It is a nialpdrome in base 7 and base 15.

It is not an unprimeable number, because it can be changed into a prime (686267) 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 3 ways as a sum of consecutive naturals, for example, 24496 + ... + 24523.

It is an arithmetic number, because the mean of its divisors is an integer number (147060).

2⁶⁸⁶²⁶⁶ is an apocalyptic number.

686266 is a deficient number, since it is larger than the sum of its proper divisors (490214).

686266 is a wasteful number, since it uses less digits than its factorization.

686266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49028.

The product of its digits is 20736, while the sum is 34.

The square root of 686266 is about 828.4117333790. The cubic root of 686266 is about 88.2058713053.

The spelling of 686266 in words is "six hundred eighty-six thousand, two hundred sixty-six".