668989282 has 16 divisors (see below), whose sum is σ = 1081197432. Its totient is φ = 308615040.

The previous prime is 668989273. The next prime is 668989291. The reversal of 668989282 is 282989866.

It is an interprime number because it is at equal distance from previous prime (668989273) and next prime (668989291).

It can be written as a sum of positive squares in 4 ways, for example, as 666620761 + 2368521 = 25819^2 + 1539^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63238 + ... + 73054.

Almost surely, 2^668989282 is an apocalyptic number.

668989282 is a deficient number, since it is larger than the sum of its proper divisors (412208150).

668989282 is a wasteful number, since it uses less digits than its factorization.

668989282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12453.

The product of its digits is 5971968, while the sum is 58.

The square root of 668989282 is about 25864.8271210151. The cubic root of 668989282 is about 874.5937845608.

The spelling of 668989282 in words is "six hundred sixty-eight million, nine hundred eighty-nine thousand, two hundred eighty-two".