665617103361 has 24 divisors (see below), whose sum is σ = 1136686025280. Its totient is φ = 367237021536.

The previous prime is 665617103323. The next prime is 665617103381. The reversal of 665617103361 is 163301716566.

It is a happy number.

It is not a de Polignac number, because 665617103361 - 2⁶ = 665617103297 is a prime.

It is a super-2 number, since 2×665617103361² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (665617103381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182159395 + ... + 182163048.

It is an arithmetic number, because the mean of its divisors is an integer number (47361917720).

Almost surely, 2^665617103361 is an apocalyptic number.

It is an amenable number.

665617103361 is a deficient number, since it is larger than the sum of its proper divisors (471068921919).

665617103361 is a wasteful number, since it uses less digits than its factorization.

665617103361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364322485 (or 364322482 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 665617103361 in words is "six hundred sixty-five billion, six hundred seventeen million, one hundred three thousand, three hundred sixty-one".