65689749806328 has 192 divisors, whose sum is σ = 196622387357760. Its totient is φ = 19706793689088.

The previous prime is 65689749806327. The next prime is 65689749806371. The reversal of 65689749806328 is 82360894798656.

It is a happy number.

65689749806328 is a `hidden beast` number, since 6 + 5 + 6 + 8 + 97 + 498 + 0 + 6 + 32 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65689749806327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96983976 + ... + 97658952.

It is an arithmetic number, because the mean of its divisors is an integer number (1024074934155).

Almost surely, 2^{65689749806328} is an apocalyptic number.

65689749806328 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65689749806328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98311193678880).

65689749806328 is an abundant number, since it is smaller than the sum of its proper divisors (130932637551432).

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

65689749806328 is a wasteful number, since it uses less digits than its factorization.

65689749806328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678486 (or 678479 counting only the distinct ones).

The product of its (nonzero) digits is 7524679680, while the sum is 81.

The spelling of 65689749806328 in words is "sixty-five trillion, six hundred eighty-nine billion, seven hundred forty-nine million, eight hundred six thousand, three hundred twenty-eight".