65165320 has 64 divisors (see below), whose sum is σ = 165499200. Its totient is φ = 22874880.

The previous prime is 65165311. The next prime is 65165341. The reversal of 65165320 is 2356156.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10207 + ... + 15313.

It is an arithmetic number, because the mean of its divisors is an integer number (2585925).

Almost surely, 2^65165320 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 65165320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82749600).

65165320 is an abundant number, since it is smaller than the sum of its proper divisors (100333880).

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

65165320 is a wasteful number, since it uses less digits than its factorization.

65165320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158 (or 5154 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 65165320 is about 8072.5039485899. The cubic root of 65165320 is about 402.4131623423.

The spelling of 65165320 in words is "sixty-five million, one hundred sixty-five thousand, three hundred twenty".