65165500 has 72 divisors (see below), whose sum is σ = 147878640. Its totient is φ = 25079200.

The previous prime is 65165491. The next prime is 65165521. The reversal of 65165500 is 556156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1104471 + ... + 1104529.

It is an arithmetic number, because the mean of its divisors is an integer number (2053870).

Almost surely, 2^65165500 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 65165500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73939320).

65165500 is an abundant number, since it is smaller than the sum of its proper divisors (82713140).

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

65165500 is a wasteful number, since it uses less digits than its factorization.

65165500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 65165500 is about 8072.5150975393. The cubic root of 65165500 is about 402.4135328579.

The spelling of 65165500 in words is "sixty-five million, one hundred sixty-five thousand, five hundred".