65918788678 has 16 divisors (see below), whose sum is σ = 102074901120. Its totient is φ = 31893969600.

The previous prime is 65918788667. The next prime is 65918788679. The reversal of 65918788678 is 87688781956.

It is a self number, because there is not a number n which added to its sum of digits gives 65918788678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65918788679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184338 + ... + 1238746.

It is an arithmetic number, because the mean of its divisors is an integer number (6379681320).

Almost surely, 2^65918788678 is an apocalyptic number.

65918788678 is a deficient number, since it is larger than the sum of its proper divisors (36156112442).

65918788678 is a wasteful number, since it uses less digits than its factorization.

65918788678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73983.

The product of its digits is 325140480, while the sum is 73.

The spelling of 65918788678 in words is "sixty-five billion, nine hundred eighteen million, seven hundred eighty-eight thousand, six hundred seventy-eight".