665204885 has 8 divisors (see below), whose sum is σ = 808350720. Its totient is φ = 525427344.

The previous prime is 665204879. The next prime is 665204909. The reversal of 665204885 is 588402566.

665204885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665204885 - 2⁶ = 665204821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841637 + ... + 842426.

It is an arithmetic number, because the mean of its divisors is an integer number (101043840).

Almost surely, 2^665204885 is an apocalyptic number.

It is an amenable number.

665204885 is a deficient number, since it is larger than the sum of its proper divisors (143145835).

665204885 is a wasteful number, since it uses less digits than its factorization.

665204885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684147.

The product of its (nonzero) digits is 460800, while the sum is 44.

The square root of 665204885 is about 25791.5661602781. The cubic root of 665204885 is about 872.9415055452.

The spelling of 665204885 in words is "six hundred sixty-five million, two hundred four thousand, eight hundred eighty-five".