506111665 has 16 divisors (see below), whose sum is σ = 634946688. Its totient is φ = 386548096.

The previous prime is 506111647. The next prime is 506111687. The reversal of 506111665 is 566111605.

It is a cyclic number.

It is not a de Polignac number, because 506111665 - 2⁷ = 506111537 is a prime.

It is a super-2 number, since 2×506111665² = 512298034898144450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60837 + ... + 68653.

It is an arithmetic number, because the mean of its divisors is an integer number (39684168).

Almost surely, 2^506111665 is an apocalyptic number.

It is an amenable number.

506111665 is a deficient number, since it is larger than the sum of its proper divisors (128835023).

506111665 is a wasteful number, since it uses less digits than its factorization.

506111665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 506111665 is about 22496.9256788567. The cubic root of 506111665 is about 796.9213262623.

The spelling of 506111665 in words is "five hundred six million, one hundred eleven thousand, six hundred sixty-five".