66560439 has 32 divisors (see below), whose sum is σ = 103219200. Its totient is φ = 37726560.

The previous prime is 66560419. The next prime is 66560449. The reversal of 66560439 is 93406566.

It is a happy number.

It is not a de Polignac number, because 66560439 - 2⁵ = 66560407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66560397 and 66560406.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 51402 + ... + 52680.

It is an arithmetic number, because the mean of its divisors is an integer number (3225600).

Almost surely, 2^66560439 is an apocalyptic number.

66560439 is a deficient number, since it is larger than the sum of its proper divisors (36658761).

66560439 is a wasteful number, since it uses less digits than its factorization.

66560439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 66560439 is about 8158.4581263864. The cubic root of 66560439 is about 405.2646525056.

The spelling of 66560439 in words is "sixty-six million, five hundred sixty thousand, four hundred thirty-nine".