506221052012666 has 8 divisors (see below), whose sum is σ = 759364177220724. Its totient is φ = 253099659605760.

The previous prime is 506221052012651. The next prime is 506221052012681. The reversal of 506221052012666 is 666210250122605.

It is an interprime number because it is at equal distance from previous prime (506221052012651) and next prime (506221052012681).

It can be written as a sum of positive squares in 2 ways, for example, as 415699699351225 + 90521352661441 = 20388715^2 + 9514271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5433142055 + ... + 5433235226.

Almost surely, 2^{506221052012666} is an apocalyptic number.

506221052012666 is a deficient number, since it is larger than the sum of its proper divisors (253143125208058).

506221052012666 is a wasteful number, since it uses less digits than its factorization.

506221052012666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10866400576.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 506221052012666 in words is "five hundred six trillion, two hundred twenty-one billion, fifty-two million, twelve thousand, six hundred sixty-six".