505266752665 has 8 divisors (see below), whose sum is σ = 606368249928. Its totient is φ = 404181304320.

The previous prime is 505266752597. The next prime is 505266752681. The reversal of 505266752665 is 566257662505.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 147409155721 + 357857596944 = 383939^2 + 598212^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505266752665 - 2¹³ = 505266744473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3942856 + ... + 4068985.

It is an arithmetic number, because the mean of its divisors is an integer number (75796031241).

Almost surely, 2^505266752665 is an apocalyptic number.

It is an amenable number.

505266752665 is a deficient number, since it is larger than the sum of its proper divisors (101101497263).

505266752665 is a wasteful number, since it uses less digits than its factorization.

505266752665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8024459.

The product of its (nonzero) digits is 22680000, while the sum is 55.

The spelling of 505266752665 in words is "five hundred five billion, two hundred sixty-six million, seven hundred fifty-two thousand, six hundred sixty-five".