65120660 has 96 divisors (see below), whose sum is σ = 157852800. Its totient is φ = 22346240.

The previous prime is 65120651. The next prime is 65120707. The reversal of 65120660 is 6602156.

65120660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×65120660³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 376334 + ... + 376506.

It is an arithmetic number, because the mean of its divisors is an integer number (1644300).

Almost surely, 2^65120660 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 65120660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78926400).

65120660 is an abundant number, since it is smaller than the sum of its proper divisors (92732140).

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

65120660 is a wasteful number, since it uses less digits than its factorization.

65120660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 65120660 is about 8069.7372943610. The cubic root of 65120660 is about 402.3212122123.

The spelling of 65120660 in words is "sixty-five million, one hundred twenty thousand, six hundred sixty".