664842426080 has 96 divisors (see below), whose sum is σ = 1796000532480. Its totient is φ = 227828390400.

The previous prime is 664842426077. The next prime is 664842426121. The reversal of 664842426080 is 80624248466.

664842426080 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 15 ways as a sum of consecutive naturals, for example, 2032991 + ... + 2337249.

It is an arithmetic number, because the mean of its divisors is an integer number (18708338880).

Almost surely, 2^664842426080 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664842426080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898000266240).

664842426080 is an abundant number, since it is smaller than the sum of its proper divisors (1131158106400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664842426080 is a wasteful number, since it uses less digits than its factorization.

664842426080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306232 (or 306224 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 50.

The spelling of 664842426080 in words is "six hundred sixty-four billion, eight hundred forty-two million, four hundred twenty-six thousand, eighty".