65111066220 has 96 divisors (see below), whose sum is σ = 188970667200. Its totient is φ = 16731065344.

The previous prime is 65111066213. The next prime is 65111066231. The reversal of 65111066220 is 2266011156.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 848902 + ... + 922418.

It is an arithmetic number, because the mean of its divisors is an integer number (1968444450).

Almost surely, 2^65111066220 is an apocalyptic number.

65111066220 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 65111066220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94485333600).

65111066220 is an abundant number, since it is smaller than the sum of its proper divisors (123859600980).

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

65111066220 is a wasteful number, since it uses less digits than its factorization.

65111066220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74067 (or 74065 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 65111066220 its reverse (2266011156), we get a palindrome (67377077376).

The spelling of 65111066220 in words is "sixty-five billion, one hundred eleven million, sixty-six thousand, two hundred twenty".