506455116665 has 4 divisors (see below), whose sum is σ = 607746140004. Its totient is φ = 405164093328.

The previous prime is 506455116659. The next prime is 506455116677. The reversal of 506455116665 is 566611554605.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167232741481 + 339222375184 = 408941^2 + 582428^2 .

It is a cyclic number.

It is not a de Polignac number, because 506455116665 - 2¹⁰ = 506455115641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50645511662 + ... + 50645511671.

It is an arithmetic number, because the mean of its divisors is an integer number (151936535001).

Almost surely, 2^506455116665 is an apocalyptic number.

It is an amenable number.

506455116665 is a deficient number, since it is larger than the sum of its proper divisors (101291023339).

506455116665 is a wasteful number, since it uses less digits than its factorization.

506455116665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101291023338.

The product of its (nonzero) digits is 3240000, while the sum is 50.

The spelling of 506455116665 in words is "five hundred six billion, four hundred fifty-five million, one hundred sixteen thousand, six hundred sixty-five".