665640163361035 has 64 divisors (see below), whose sum is σ = 849364052060160. Its totient is φ = 499892643712000.

The previous prime is 665640163361003. The next prime is 665640163361077. The reversal of 665640163361035 is 530163361046566.

665640163361035 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665640163361035 - 2⁵ = 665640163361003 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9560601234 + ... + 9560670856.

It is an arithmetic number, because the mean of its divisors is an integer number (13271313313440).

Almost surely, 2^{665640163361035} is an apocalyptic number.

665640163361035 is a deficient number, since it is larger than the sum of its proper divisors (183723888699125).

665640163361035 is a wasteful number, since it uses less digits than its factorization.

665640163361035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75180.

The product of its (nonzero) digits is 20995200, while the sum is 55.

The spelling of 665640163361035 in words is "six hundred sixty-five trillion, six hundred forty billion, one hundred sixty-three million, three hundred sixty-one thousand, thirty-five".