404042420666 has 8 divisors (see below), whose sum is σ = 608733515520. Its totient is φ = 201131248828.

The previous prime is 404042420603. The next prime is 404042420681. The reversal of 404042420666 is 666024240404.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444980186 + ... + 444981093.

It is an arithmetic number, because the mean of its divisors is an integer number (76091689440).

Almost surely, 2^404042420666 is an apocalyptic number.

404042420666 is a deficient number, since it is larger than the sum of its proper divisors (204691094854).

404042420666 is a wasteful number, since it uses less digits than its factorization.

404042420666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889961508.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 404042420666 in words is "four hundred four billion, forty-two million, four hundred twenty thousand, six hundred sixty-six".