65868736320 has 168 divisors, whose sum is σ = 226657997280. Its totient is φ = 17557478400.

The previous prime is 65868736303. The next prime is 65868736433. The reversal of 65868736320 is 2363786856.

65868736320 is a `hidden beast` number, since 6 + 586 + 8 + 7 + 36 + 3 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11087911 + ... + 11093849.

Almost surely, 2^65868736320 is an apocalyptic number.

65868736320 is a gapful number since it is divisible by the number (60) 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 65868736320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113328998640).

65868736320 is an abundant number, since it is smaller than the sum of its proper divisors (160789260960).

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

65868736320 is a wasteful number, since it uses less digits than its factorization.

65868736320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9813 (or 9800 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 65868736320 in words is "sixty-five billion, eight hundred sixty-eight million, seven hundred thirty-six thousand, three hundred twenty".