65565500 has 192 divisors, whose sum is σ = 193729536. Its totient is φ = 18720000.

The previous prime is 65565439. The next prime is 65565503. The reversal of 65565500 is 556556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65565503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 500435 + ... + 500565.

It is an arithmetic number, because the mean of its divisors is an integer number (1009008).

Almost surely, 2^65565500 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 65565500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96864768).

65565500 is an abundant number, since it is smaller than the sum of its proper divisors (128164036).

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

65565500 is a wasteful number, since it uses less digits than its factorization.

65565500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 65565500 is about 8097.2526204880. The cubic root of 65565500 is about 403.2352211479.

It can be divided in two parts, 655 and 65500, that multiplied together give a square (42902500 = 6550²).

The spelling of 65565500 in words is "sixty-five million, five hundred sixty-five thousand, five hundred".