280666085 has 16 divisors (see below), whose sum is σ = 387504000. Its totient is φ = 191161536.

The previous prime is 280666051. The next prime is 280666103. The reversal of 280666085 is 580666082.

It is a cyclic number.

It is not a de Polignac number, because 280666085 - 2²⁸ = 12230629 is a prime.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 21695 + ... + 32124.

It is an arithmetic number, because the mean of its divisors is an integer number (24219000).

Almost surely, 2^280666085 is an apocalyptic number.

It is an amenable number.

280666085 is a deficient number, since it is larger than the sum of its proper divisors (106837915).

280666085 is a wasteful number, since it uses less digits than its factorization.

280666085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53980.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 280666085 is about 16753.0918042014. The cubic root of 280666085 is about 654.7316150803.

The spelling of 280666085 in words is "two hundred eighty million, six hundred sixty-six thousand, eighty-five".