506666669 has 2 divisors, whose sum is σ = 506666670. Its totient is φ = 506666668.

The previous prime is 506666659. The next prime is 506666717. The reversal of 506666669 is 966666605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331422025 + 175244644 = 18205^2 + 13238^2 .

It is a cyclic number.

It is not a de Polignac number, because 506666669 - 2¹² = 506662573 is a prime.

It is a super-2 number, since 2×506666669² = 513422226951111122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506666659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253333334 + 253333335.

It is an arithmetic number, because the mean of its divisors is an integer number (253333335).

Almost surely, 2^506666669 is an apocalyptic number.

It is an amenable number.

506666669 is a deficient number, since it is larger than the sum of its proper divisors (1).

506666669 is an equidigital number, since it uses as much as digits as its factorization.

506666669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 50.

The square root of 506666669 is about 22509.2574066760. The cubic root of 506666669 is about 797.2125221774.

The spelling of 506666669 in words is "five hundred six million, six hundred sixty-six thousand, six hundred sixty-nine".