66560564 has 12 divisors (see below), whose sum is σ = 133121184. Its totient is φ = 28525944.

The previous prime is 66560537. The next prime is 66560569. The reversal of 66560564 is 46506566.

66560564 is an admirable number.

It is a super-3 number, since 3×66560564³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66560569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188554 + ... + 1188609.

It is an arithmetic number, because the mean of its divisors is an integer number (11093432).

Almost surely, 2^66560564 is an apocalyptic number.

It is an amenable number.

66560564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66560564 is a wasteful number, since it uses less digits than its factorization.

66560564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377174 (or 2377172 counting only the distinct ones).

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

The square root of 66560564 is about 8158.4657871441. The cubic root of 66560564 is about 405.2649062001.

The spelling of 66560564 in words is "sixty-six million, five hundred sixty thousand, five hundred sixty-four".