665501624959 has 2 divisors, whose sum is σ = 665501624960. Its totient is φ = 665501624958.

The previous prime is 665501624939. The next prime is 665501624999. The reversal of 665501624959 is 959426105566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665501624959 - 2⁷ = 665501624831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665501624939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332750812479 + 332750812480.

It is an arithmetic number, because the mean of its divisors is an integer number (332750812480).

Almost surely, 2^665501624959 is an apocalyptic number.

665501624959 is a deficient number, since it is larger than the sum of its proper divisors (1).

665501624959 is an equidigital number, since it uses as much as digits as its factorization.

665501624959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496000, while the sum is 58.

The spelling of 665501624959 in words is "six hundred sixty-five billion, five hundred one million, six hundred twenty-four thousand, nine hundred fifty-nine".