65689975120 has 160 divisors (see below), whose sum is σ = 194844672000. Its totient is φ = 19998558720.

The previous prime is 65689975097. The next prime is 65689975123. The reversal of 65689975120 is 2157998656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65689975123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140881 + ... + 388879.

It is an arithmetic number, because the mean of its divisors is an integer number (1217779200).

Almost surely, 2^65689975120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65689975120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97422336000).

65689975120 is an abundant number, since it is smaller than the sum of its proper divisors (129154696880).

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

65689975120 is a wasteful number, since it uses less digits than its factorization.

65689975120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248073 (or 248067 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 65689975120 in words is "sixty-five billion, six hundred eighty-nine million, nine hundred seventy-five thousand, one hundred twenty".