65560320 has 288 divisors, whose sum is σ = 266864640. Its totient is φ = 14929920.

The previous prime is 65560309. The next prime is 65560331. The reversal of 65560320 is 2306556.

65560320 is a `hidden beast` number, since 6 + 55 + 603 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (65560309) and next prime (65560331).

It is a tau number, because it is divible by the number of its divisors (288).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241785 + ... + 242055.

Almost surely, 2^65560320 is an apocalyptic number.

65560320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65560320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133432320).

65560320 is an abundant number, since it is smaller than the sum of its proper divisors (201304320).

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

65560320 is a wasteful number, since it uses less digits than its factorization.

65560320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 65560320 is about 8096.9327525922. The cubic root of 65560320 is about 403.2246016735.

Adding to 65560320 its reverse (2306556), we get a palindrome (67866876).

The spelling of 65560320 in words is "sixty-five million, five hundred sixty thousand, three hundred twenty".