65806578042 has 8 divisors (see below), whose sum is σ = 131613156096. Its totient is φ = 21935526012.

The previous prime is 65806578007. The next prime is 65806578083. The reversal of 65806578042 is 24087560856.

It is a happy number.

65806578042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

65806578042 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5483881498 + ... + 5483881509.

It is an arithmetic number, because the mean of its divisors is an integer number (16451644512).

Almost surely, 2^65806578042 is an apocalyptic number.

65806578042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

65806578042 is a wasteful number, since it uses less digits than its factorization.

65806578042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10967763012.

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 65806578042 in words is "sixty-five billion, eight hundred six million, five hundred seventy-eight thousand, forty-two".