666215282 has 12 divisors (see below), whose sum is σ = 1015985178. Its totient is φ = 327643200.

The previous prime is 666215279. The next prime is 666215293. The reversal of 666215282 is 282512666.

It can be written as a sum of positive squares in 3 ways, for example, as 66406201 + 599809081 = 8149^2 + 24491^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37319 + ... + 52202.

Almost surely, 2^666215282 is an apocalyptic number.

666215282 is a deficient number, since it is larger than the sum of its proper divisors (349769896).

666215282 is an equidigital number, since it uses as much as digits as its factorization.

666215282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89645 (or 89584 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 666215282 is about 25811.1464681443. The cubic root of 666215282 is about 873.3832598085.

The spelling of 666215282 in words is "six hundred sixty-six million, two hundred fifteen thousand, two hundred eighty-two".