665066160511 has 2 divisors, whose sum is σ = 665066160512. Its totient is φ = 665066160510.

The previous prime is 665066160487. The next prime is 665066160541. The reversal of 665066160511 is 115061660566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665066160511 - 2¹⁵ = 665066127743 is a prime.

It is a super-2 number, since 2×665066160511² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665066160541) 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, 332533080255 + 332533080256.

It is an arithmetic number, because the mean of its divisors is an integer number (332533080256).

Almost surely, 2^665066160511 is an apocalyptic number.

665066160511 is a deficient number, since it is larger than the sum of its proper divisors (1).

665066160511 is an equidigital number, since it uses as much as digits as its factorization.

665066160511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 665066160511 in words is "six hundred sixty-five billion, sixty-six million, one hundred sixty thousand, five hundred eleven".