665016585 has 16 divisors (see below), whose sum is σ = 1064555520. Its totient is φ = 354499200.

The previous prime is 665016563. The next prime is 665016593. The reversal of 665016585 is 585610566.

It is not a de Polignac number, because 665016585 - 2⁸ = 665016329 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23685 + ... + 43485.

It is an arithmetic number, because the mean of its divisors is an integer number (66534720).

Almost surely, 2^665016585 is an apocalyptic number.

It is an amenable number.

665016585 is a deficient number, since it is larger than the sum of its proper divisors (399538935).

665016585 is a wasteful number, since it uses less digits than its factorization.

665016585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22048.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 665016585 is about 25787.9154838075. The cubic root of 665016585 is about 872.8591297231.

The spelling of 665016585 in words is "six hundred sixty-five million, sixteen thousand, five hundred eighty-five".