65552320 has 56 divisors (see below), whose sum is σ = 157423104. Its totient is φ = 25998336.

The previous prime is 65552293. The next prime is 65552329. The reversal of 65552320 is 2325556.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65552329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39834 + ... + 41446.

Almost surely, 2^65552320 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 65552320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78711552).

65552320 is an abundant number, since it is smaller than the sum of its proper divisors (91870784).

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

65552320 is a wasteful number, since it uses less digits than its factorization.

65552320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757 (or 1747 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 65552320 is about 8096.4387232906. The cubic root of 65552320 is about 403.2081998416.

Adding to 65552320 its reverse (2325556), we get a palindrome (67877876).

It can be divided in two parts, 655 and 52320, that added together give a triangular number (52975 = T₃₂₅).

The spelling of 65552320 in words is "sixty-five million, five hundred fifty-two thousand, three hundred twenty".