65688372736 has 80 divisors (see below), whose sum is σ = 150992835840. Its totient is φ = 27965491200.

The previous prime is 65688372707. The next prime is 65688372749. The reversal of 65688372736 is 63727388656.

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, 480495 + ... + 601873.

It is an arithmetic number, because the mean of its divisors is an integer number (1887410448).

Almost surely, 2^65688372736 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 65688372736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75496417920).

65688372736 is an abundant number, since it is smaller than the sum of its proper divisors (85304463104).

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

65688372736 is a wasteful number, since it uses less digits than its factorization.

65688372736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121555 (or 121539 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 61.

The spelling of 65688372736 in words is "sixty-five billion, six hundred eighty-eight million, three hundred seventy-two thousand, seven hundred thirty-six".