65963887281 has 6 divisors (see below), whose sum is σ = 95281170530. Its totient is φ = 43975924848.

The previous prime is 65963887267. The next prime is 65963887289. The reversal of 65963887281 is 18278836956.

65963887281 is a `hidden beast` number, since 6 + 596 + 38 + 8 + 7 + 2 + 8 + 1 = 666.

65963887281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 53921019681 + 12042867600 = 232209^2 + 109740^2 .

It is not a de Polignac number, because 65963887281 - 2¹⁸ = 65963625137 is a prime.

It is a super-2 number, since 2×65963887281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65963887289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3664660396 + ... + 3664660413.

Almost surely, 2^65963887281 is an apocalyptic number.

It is an amenable number.

65963887281 is a deficient number, since it is larger than the sum of its proper divisors (29317283249).

65963887281 is a wasteful number, since it uses less digits than its factorization.

65963887281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7329320815 (or 7329320812 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 65963887281 in words is "sixty-five billion, nine hundred sixty-three million, eight hundred eighty-seven thousand, two hundred eighty-one".