665355134959 has 2 divisors, whose sum is σ = 665355134960. Its totient is φ = 665355134958.

The previous prime is 665355134953. The next prime is 665355134981. The reversal of 665355134959 is 959431553566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665355134959 - 2¹³ = 665355126767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665355134897 and 665355134906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665355134953) 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 as a sum of consecutive naturals, namely, 332677567479 + 332677567480.

It is an arithmetic number, because the mean of its divisors is an integer number (332677567480).

Almost surely, 2^665355134959 is an apocalyptic number.

665355134959 is a deficient number, since it is larger than the sum of its proper divisors (1).

665355134959 is an equidigital number, since it uses as much as digits as its factorization.

665355134959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610000, while the sum is 61.

The spelling of 665355134959 in words is "six hundred sixty-five billion, three hundred fifty-five million, one hundred thirty-four thousand, nine hundred fifty-nine".