665101563017 has 2 divisors, whose sum is σ = 665101563018. Its totient is φ = 665101563016.

The previous prime is 665101563013. The next prime is 665101563019. The reversal of 665101563017 is 710365101566.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386997212281 + 278104350736 = 622091^2 + 527356^2 .

It is a cyclic number.

It is not a de Polignac number, because 665101563017 - 2² = 665101563013 is a prime.

Together with 665101563019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (665101563013) 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 as a sum of consecutive naturals, namely, 332550781508 + 332550781509.

It is an arithmetic number, because the mean of its divisors is an integer number (332550781509).

Almost surely, 2^665101563017 is an apocalyptic number.

It is an amenable number.

665101563017 is a deficient number, since it is larger than the sum of its proper divisors (1).

665101563017 is an equidigital number, since it uses as much as digits as its factorization.

665101563017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 665101563017 in words is "six hundred sixty-five billion, one hundred one million, five hundred sixty-three thousand, seventeen".