64566560 has 96 divisors (see below), whose sum is σ = 163477440. Its totient is φ = 24026112.

The previous prime is 64566559. The next prime is 64566569. The reversal of 64566560 is 6566546.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (64566569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203522 + ... + 203838.

It is an arithmetic number, because the mean of its divisors is an integer number (1702890).

Almost surely, 2^64566560 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 64566560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81738720).

64566560 is an abundant number, since it is smaller than the sum of its proper divisors (98910880).

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

64566560 is a wasteful number, since it uses less digits than its factorization.

64566560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 64566560 is about 8035.3319782072. The cubic root of 64566560 is about 401.1768673954.

The spelling of 64566560 in words is "sixty-four million, five hundred sixty-six thousand, five hundred sixty".