66560416 has 24 divisors (see below), whose sum is σ = 141121764. Its totient is φ = 30720000.

The previous prime is 66560407. The next prime is 66560419. The reversal of 66560416 is 61406566.

It can be written as a sum of positive squares in 2 ways, for example, as 64064016 + 2496400 = 8004^2 + 1580^2 .

It is not an unprimeable number, because it can be changed into a prime (66560419) 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, 79585 + ... + 80416.

Almost surely, 2^66560416 is an apocalyptic number.

It is an amenable number.

66560416 is an abundant number, since it is smaller than the sum of its proper divisors (74561348).

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

66560416 is a wasteful number, since it uses less digits than its factorization.

66560416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160024 (or 160016 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 66560416 is about 8158.4567168062. The cubic root of 66560416 is about 405.2646058258.

The spelling of 66560416 in words is "sixty-six million, five hundred sixty thousand, four hundred sixteen".