666666444424 has 32 divisors (see below), whose sum is σ = 1261161252000. Its totient is φ = 330357244672.

The previous prime is 666666444403. The next prime is 666666444467. The reversal of 666666444424 is 424444666666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16739367 + ... + 16779145.

It is an arithmetic number, because the mean of its divisors is an integer number (39411289125).

Almost surely, 2^666666444424 is an apocalyptic number.

It is an amenable number.

666666444424 is a deficient number, since it is larger than the sum of its proper divisors (594494807576).

666666444424 is a wasteful number, since it uses less digits than its factorization.

666666444424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58437 (or 58433 counting only the distinct ones).

The product of its digits is 95551488, while the sum is 58.

The spelling of 666666444424 in words is "six hundred sixty-six billion, six hundred sixty-six million, four hundred forty-four thousand, four hundred twenty-four".