65920722318880 has 192 divisors, whose sum is σ = 182993692347648. Its totient is φ = 22123714498560.

The previous prime is 65920722318877. The next prime is 65920722318883. The reversal of 65920722318880 is 8881322702956.

It is an interprime number because it is at equal distance from previous prime (65920722318877) and next prime (65920722318883).

It is not an unprimeable number, because it can be changed into a prime (65920722318883) 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, 145588197 + ... + 146040283.

It is an arithmetic number, because the mean of its divisors is an integer number (953092147644).

Almost surely, 2^{65920722318880} 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 65920722318880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91496846173824).

65920722318880 is an abundant number, since it is smaller than the sum of its proper divisors (117072970028768).

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

65920722318880 is a wasteful number, since it uses less digits than its factorization.

65920722318880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458499 (or 458491 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 65920722318880 in words is "sixty-five trillion, nine hundred twenty billion, seven hundred twenty-two million, three hundred eighteen thousand, eight hundred eighty".