65687890008 has 32 divisors (see below), whose sum is σ = 176852012400. Its totient is φ = 20211658368.

The previous prime is 65687889947. The next prime is 65687890013. The reversal of 65687890008 is 80009878656.

65687890008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 65687890008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105268743 + ... + 105269366.

Almost surely, 2^65687890008 is an apocalyptic number.

It is an amenable number.

65687890008 is an abundant number, since it is smaller than the sum of its proper divisors (111164122392).

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

65687890008 is a wasteful number, since it uses less digits than its factorization.

65687890008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210538131 (or 210538127 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 65687890008 in words is "sixty-five billion, six hundred eighty-seven million, eight hundred ninety thousand, eight".