668086280 has 16 divisors (see below), whose sum is σ = 1503194220. Its totient is φ = 267234496.

The previous prime is 668086261. The next prime is 668086283. The reversal of 668086280 is 82680866.

It can be written as a sum of positive squares in 2 ways, for example, as 594091876 + 73994404 = 24374^2 + 8602^2 .

It is not an unprimeable number, because it can be changed into a prime (668086283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8351039 + ... + 8351118.

Almost surely, 2^668086280 is an apocalyptic number.

It is an amenable number.

668086280 is an abundant number, since it is smaller than the sum of its proper divisors (835107940).

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

668086280 is a wasteful number, since it uses less digits than its factorization.

668086280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16702168 (or 16702164 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 668086280 is about 25847.3650494591. The cubic root of 668086280 is about 874.2000983619.

The spelling of 668086280 in words is "six hundred sixty-eight million, eighty-six thousand, two hundred eighty".