686553266 has 16 divisors (see below), whose sum is σ = 1228120704. Its totient is φ = 281444064.

The previous prime is 686553253. The next prime is 686553269. The reversal of 686553266 is 662355686.

It is a self number, because there is not a number n which added to its sum of digits gives 686553266.

It is not an unprimeable number, because it can be changed into a prime (686553269) 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 7 ways as a sum of consecutive naturals, for example, 1065755 + ... + 1066398.

It is an arithmetic number, because the mean of its divisors is an integer number (76757544).

Almost surely, 2^686553266 is an apocalyptic number.

686553266 is a deficient number, since it is larger than the sum of its proper divisors (541567438).

686553266 is a wasteful number, since it uses less digits than its factorization.

686553266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132185.

The product of its digits is 1555200, while the sum is 47.

The square root of 686553266 is about 26202.1614757256. The cubic root of 686553266 is about 882.1817703567.

The spelling of 686553266 in words is "six hundred eighty-six million, five hundred fifty-three thousand, two hundred sixty-six".