65655866855656 has 128 divisors (see below), whose sum is σ = 154229590425600. Its totient is φ = 25455785921280.

The previous prime is 65655866855653. The next prime is 65655866855737.

65655866855656 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 65655866855656.

It is not an unprimeable number, because it can be changed into a prime (65655866855653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104202010 + ... + 104830198.

It is an arithmetic number, because the mean of its divisors is an integer number (1204918675200).

Almost surely, 2^{65655866855656} 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 65655866855656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77114795212800).

65655866855656 is an abundant number, since it is smaller than the sum of its proper divisors (88573723569944).

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

65655866855656 is a wasteful number, since it uses less digits than its factorization.

65655866855656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629039 (or 629035 counting only the distinct ones).

The product of its digits is 46656000000, while the sum is 82.

The spelling of 65655866855656 in words is "sixty-five trillion, six hundred fifty-five billion, eight hundred sixty-six million, eight hundred fifty-five thousand, six hundred fifty-six".