666666444422 has 8 divisors (see below), whose sum is σ = 1090908727272. Its totient is φ = 303030202000.

The previous prime is 666666444403. The next prime is 666666444467. The reversal of 666666444422 is 224444666666.

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

It is a super-2 number, since 2×666666444422² (a number of 24 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15151510079 + ... + 15151510122.

It is an arithmetic number, because the mean of its divisors is an integer number (136363590909).

It is a self-describing number.

Almost surely, 2^666666444422 is an apocalyptic number.

666666444422 is a deficient number, since it is larger than the sum of its proper divisors (424242282850).

666666444422 is a wasteful number, since it uses less digits than its factorization.

666666444422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30303020214.

The product of its digits is 47775744, while the sum is 56.

The spelling of 666666444422 in words is "six hundred sixty-six billion, six hundred sixty-six million, four hundred forty-four thousand, four hundred twenty-two".