404000066642 has 16 divisors (see below), whose sum is σ = 623997094392. Its totient is φ = 196052090880.

The previous prime is 404000066611. The next prime is 404000066681. The reversal of 404000066642 is 246660000404.

It can be written as a sum of positive squares in 4 ways, for example, as 168018829801 + 235981236841 = 409901^2 + 485779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404000066599 and 404000066608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12747983 + ... + 12779634.

Almost surely, 2^404000066642 is an apocalyptic number.

404000066642 is a deficient number, since it is larger than the sum of its proper divisors (219997027750).

404000066642 is a wasteful number, since it uses less digits than its factorization.

404000066642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25527853.

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 404000066642 in words is "four hundred four billion, sixty-six thousand, six hundred forty-two".