666007280 has 40 divisors (see below), whose sum is σ = 1586242224. Its totient is φ = 259904000.

The previous prime is 666007273. The next prime is 666007291. The reversal of 666007280 is 82700666.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 666007280.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 98246 + ... + 104805.

Almost surely, 2^666007280 is an apocalyptic number.

It is an amenable number.

666007280 is an abundant number, since it is smaller than the sum of its proper divisors (920234944).

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

666007280 is a wasteful number, since it uses less digits than its factorization.

666007280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203105 (or 203099 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 666007280 is about 25807.1168478774. The cubic root of 666007280 is about 873.2923560726.

The spelling of 666007280 in words is "six hundred sixty-six million, seven thousand, two hundred eighty".