65992139705856 has 1920 divisors, whose sum is σ = 240331273814016. Its totient is φ = 15903704678400.

The previous prime is 65992139705819. The next prime is 65992139705893. The reversal of 65992139705856 is 65850793129956.

It is an interprime number because it is at equal distance from previous prime (65992139705819) and next prime (65992139705893).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 45480453931 + ... + 45480455381.

Almost surely, 2^{65992139705856} 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 65992139705856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120165636907008).

65992139705856 is an abundant number, since it is smaller than the sum of its proper divisors (174339134108160).

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

65992139705856 is a wasteful number, since it uses less digits than its factorization.

65992139705856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 1102248000, while the sum is 75.

The spelling of 65992139705856 in words is "sixty-five trillion, nine hundred ninety-two billion, one hundred thirty-nine million, seven hundred five thousand, eight hundred fifty-six".