506666717 has 2 divisors, whose sum is σ = 506666718. Its totient is φ = 506666716.

The previous prime is 506666669. The next prime is 506666731. The reversal of 506666717 is 717666605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465437476 + 41229241 = 21574^2 + 6421^2 .

It is a cyclic number.

It is not a de Polignac number, because 506666717 - 2¹⁰ = 506665693 is a prime.

It is a super-2 number, since 2×506666717² = 513422324231116178, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506660717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253333358 + 253333359.

It is an arithmetic number, because the mean of its divisors is an integer number (253333359).

Almost surely, 2^506666717 is an apocalyptic number.

It is an amenable number.

506666717 is a deficient number, since it is larger than the sum of its proper divisors (1).

506666717 is an equidigital number, since it uses as much as digits as its factorization.

506666717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 506666717 is about 22509.2584729040. The cubic root of 506666717 is about 797.2125473525.

The spelling of 506666717 in words is "five hundred six million, six hundred sixty-six thousand, seven hundred seventeen".