665512145045635 has 32 divisors (see below), whose sum is σ = 805294914935040. Its totient is φ = 527974903185408.

The previous prime is 665512145045599. The next prime is 665512145045641. The reversal of 665512145045635 is 536540541215566.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 665512145045635 - 2³⁷ = 665374706092163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665512145045635.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 804580951 + ... + 805407679.

It is an arithmetic number, because the mean of its divisors is an integer number (25165466091720).

Almost surely, 2^{665512145045635} is an apocalyptic number.

665512145045635 is a deficient number, since it is larger than the sum of its proper divisors (139782769889405).

665512145045635 is a wasteful number, since it uses less digits than its factorization.

665512145045635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829567.

The product of its (nonzero) digits is 64800000, while the sum is 58.

The spelling of 665512145045635 in words is "six hundred sixty-five trillion, five hundred twelve billion, one hundred forty-five million, forty-five thousand, six hundred thirty-five".