66560430 has 64 divisors (see below), whose sum is σ = 163840320. Its totient is φ = 17301504.

The previous prime is 66560419. The next prime is 66560449. The reversal of 66560430 is 3406566.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258862 + ... + 259118.

It is an arithmetic number, because the mean of its divisors is an integer number (2560005).

Almost surely, 2^66560430 is an apocalyptic number.

66560430 is an abundant number, since it is smaller than the sum of its proper divisors (97279890).

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

66560430 is a wasteful number, since it uses less digits than its factorization.

66560430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 66560430 is about 8158.4575748116. The cubic root of 66560430 is about 405.2646342396.

Adding to 66560430 its reverse (3406566), we get a palindrome (69966996).

The spelling of 66560430 in words is "sixty-six million, five hundred sixty thousand, four hundred thirty".