65881618808 has 16 divisors (see below), whose sum is σ = 124500698880. Its totient is φ = 32681432448.

The previous prime is 65881618771. The next prime is 65881618867. The reversal of 65881618808 is 80881618856.

It is a congruent 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, 32421041 + ... + 32423072.

It is an arithmetic number, because the mean of its divisors is an integer number (7781293680).

Almost surely, 2^65881618808 is an apocalyptic number.

It is an amenable number.

65881618808 is a deficient number, since it is larger than the sum of its proper divisors (58619080072).

65881618808 is a wasteful number, since it uses less digits than its factorization.

65881618808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64844246 (or 64844242 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 59.

The spelling of 65881618808 in words is "sixty-five billion, eight hundred eighty-one million, six hundred eighteen thousand, eight hundred eight".