668814284 has 12 divisors (see below), whose sum is σ = 1174652304. Its totient is φ = 333199344.

The previous prime is 668814271. The next prime is 668814317. The reversal of 668814284 is 482418866.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300704 + ... + 302919.

It is an arithmetic number, because the mean of its divisors is an integer number (97887692).

Almost surely, 2^668814284 is an apocalyptic number.

It is an amenable number.

668814284 is a deficient number, since it is larger than the sum of its proper divisors (505838020).

668814284 is a wasteful number, since it uses less digits than its factorization.

668814284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603904 (or 603902 counting only the distinct ones).

The product of its digits is 589824, while the sum is 47.

The square root of 668814284 is about 25861.4439658732. The cubic root of 668814284 is about 874.5175175141.

The spelling of 668814284 in words is "six hundred sixty-eight million, eight hundred fourteen thousand, two hundred eighty-four".