255011660065 has 4 divisors (see below), whose sum is σ = 306013992084. Its totient is φ = 204009328048.

The previous prime is 255011660053. The next prime is 255011660069. The reversal of 255011660065 is 560066110552.

255011660065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158811814144 + 96199845921 = 398512^2 + 310161^2 .

It is a cyclic number.

It is not a de Polignac number, because 255011660065 - 2⁷ = 255011659937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255011660069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25501166002 + ... + 25501166011.

It is an arithmetic number, because the mean of its divisors is an integer number (76503498021).

Almost surely, 2^255011660065 is an apocalyptic number.

It is an amenable number.

255011660065 is a deficient number, since it is larger than the sum of its proper divisors (51002332019).

255011660065 is an equidigital number, since it uses as much as digits as its factorization.

255011660065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51002332018.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 255011660065 in words is "two hundred fifty-five billion, eleven million, six hundred sixty thousand, sixty-five".