663611004201265 has 4 divisors (see below), whose sum is σ = 796333205041524. Its totient is φ = 530888803361008.

The previous prime is 663611004201203. The next prime is 663611004201347. The reversal of 663611004201265 is 562102400116366.

663611004201265 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 227890635026209 + 435720369175056 = 15096047^2 + 20873916^2 .

It is a cyclic number.

It is not a de Polignac number, because 663611004201265 - 2¹⁹ = 663611003676977 is a prime.

It is a super-2 number, since 2×663611004201265² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66361100420122 + ... + 66361100420131.

It is an arithmetic number, because the mean of its divisors is an integer number (199083301260381).

Almost surely, 2^{663611004201265} is an apocalyptic number.

It is an amenable number.

663611004201265 is a deficient number, since it is larger than the sum of its proper divisors (132722200840259).

663611004201265 is a wasteful number, since it uses less digits than its factorization.

663611004201265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132722200840258.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 663611004201265 in words is "six hundred sixty-three trillion, six hundred eleven billion, four million, two hundred one thousand, two hundred sixty-five".