668461286 has 16 divisors (see below), whose sum is σ = 1011225600. Its totient is φ = 331392648.

The previous prime is 668461271. The next prime is 668461309. The reversal of 668461286 is 682164866.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 668461286.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365771 + ... + 367593.

It is an arithmetic number, because the mean of its divisors is an integer number (63201600).

Almost surely, 2^668461286 is an apocalyptic number.

668461286 is a deficient number, since it is larger than the sum of its proper divisors (342764314).

668461286 is a wasteful number, since it uses less digits than its factorization.

668461286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283.

The product of its digits is 663552, while the sum is 47.

The square root of 668461286 is about 25854.6182721772. The cubic root of 668461286 is about 874.3636346058.

The spelling of 668461286 in words is "six hundred sixty-eight million, four hundred sixty-one thousand, two hundred eighty-six".