65220515481066 has 64 divisors (see below), whose sum is σ = 145811302229376. Its totient is φ = 19276288409600.

The previous prime is 65220515481047. The next prime is 65220515481071. The reversal of 65220515481066 is 66018451502256.

65220515481066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6149290 + ... + 12971306.

It is an arithmetic number, because the mean of its divisors is an integer number (2278301597334).

Almost surely, 2^{65220515481066} is an apocalyptic number.

65220515481066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 65220515481066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72905651114688).

65220515481066 is an abundant number, since it is smaller than the sum of its proper divisors (80590786748310).

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

65220515481066 is a wasteful number, since it uses less digits than its factorization.

65220515481066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6825607.

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 65220515481066 in words is "sixty-five trillion, two hundred twenty billion, five hundred fifteen million, four hundred eighty-one thousand, sixty-six".