65500120 has 64 divisors (see below), whose sum is σ = 169128000. Its totient is φ = 22364160.

The previous prime is 65500109. The next prime is 65500121. The reversal of 65500120 is 2100556.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65500121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 125460 + ... + 125980.

It is an arithmetic number, because the mean of its divisors is an integer number (2642625).

Almost surely, 2^65500120 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 65500120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84564000).

65500120 is an abundant number, since it is smaller than the sum of its proper divisors (103627880).

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

65500120 is a wasteful number, since it uses less digits than its factorization.

65500120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 65500120 is about 8093.2144417407. The cubic root of 65500120 is about 403.1011451141.

Adding to 65500120 its reverse (2100556), we get a palindrome (67600676).

The spelling of 65500120 in words is "sixty-five million, five hundred thousand, one hundred twenty".