65522560 has 64 divisors (see below), whose sum is σ = 160931520. Its totient is φ = 25491456.

The previous prime is 65522533. The next prime is 65522581. The reversal of 65522560 is 6522556.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22297 + ... + 25063.

It is an arithmetic number, because the mean of its divisors is an integer number (2514555).

Almost surely, 2^65522560 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 65522560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80465760).

65522560 is an abundant number, since it is smaller than the sum of its proper divisors (95408960).

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

65522560 is a wasteful number, since it uses less digits than its factorization.

65522560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 65522560 is about 8094.6006695822. The cubic root of 65522560 is about 403.1471733091.

The spelling of 65522560 in words is "sixty-five million, five hundred twenty-two thousand, five hundred sixty".