664838826004 has 24 divisors (see below), whose sum is σ = 1175201576640. Its totient is φ = 329071498176.

The previous prime is 664838825993. The next prime is 664838826023. The reversal of 664838826004 is 400628838466.

664838826004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 16912 + ... + 1153240.

It is an arithmetic number, because the mean of its divisors is an integer number (48966732360).

Almost surely, 2^664838826004 is an apocalyptic number.

It is an amenable number.

664838826004 is a deficient number, since it is larger than the sum of its proper divisors (510362750636).

664838826004 is a wasteful number, since it uses less digits than its factorization.

664838826004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137807 (or 1137805 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 55.

The spelling of 664838826004 in words is "six hundred sixty-four billion, eight hundred thirty-eight million, eight hundred twenty-six thousand, four".