506223331666 has 16 divisors (see below), whose sum is σ = 845943499800. Its totient is φ = 225584932608.

The previous prime is 506223331661. The next prime is 506223331673. The reversal of 506223331666 is 666133322605.

It can be written as a sum of positive squares in 4 ways, for example, as 466031502225 + 40191829441 = 682665^2 + 200479^2 .

It is not an unprimeable number, because it can be changed into a prime (506223331661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335691111 + ... + 335692618.

Almost surely, 2^506223331666 is an apocalyptic number.

506223331666 is a deficient number, since it is larger than the sum of its proper divisors (339720168134).

506223331666 is a wasteful number, since it uses less digits than its factorization.

506223331666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671383773.

The product of its (nonzero) digits is 699840, while the sum is 43.

The spelling of 506223331666 in words is "five hundred six billion, two hundred twenty-three million, three hundred thirty-one thousand, six hundred sixty-six".