668210286 has 16 divisors (see below), whose sum is σ = 1382504400. Its totient is φ = 215056128.

The previous prime is 668210281. The next prime is 668210299. The reversal of 668210286 is 682012866.

668210286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668210281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1919971 + ... + 1920318.

It is an arithmetic number, because the mean of its divisors is an integer number (86406525).

Almost surely, 2^668210286 is an apocalyptic number.

668210286 is an abundant number, since it is smaller than the sum of its proper divisors (714294114).

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

668210286 is a wasteful number, since it uses less digits than its factorization.

668210286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840323.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 668210286 is about 25849.7637513382. The cubic root of 668210286 is about 874.2541828687.

The spelling of 668210286 in words is "six hundred sixty-eight million, two hundred ten thousand, two hundred eighty-six".