66560429 has 4 divisors (see below), whose sum is σ = 71680476. Its totient is φ = 61440384.

The previous prime is 66560419. The next prime is 66560449. The reversal of 66560429 is 92406566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4182025 + 62378404 = 2045^2 + 7898^2 .

It is a cyclic number.

It is not a de Polignac number, because 66560429 - 2¹² = 66556333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66560392 and 66560401.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2560004 + ... + 2560029.

It is an arithmetic number, because the mean of its divisors is an integer number (17920119).

Almost surely, 2^66560429 is an apocalyptic number.

It is an amenable number.

66560429 is a deficient number, since it is larger than the sum of its proper divisors (5120047).

66560429 is a wasteful number, since it uses less digits than its factorization.

66560429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120046.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 66560429 is about 8158.4575135255. The cubic root of 66560429 is about 405.2646322101.

The spelling of 66560429 in words is "sixty-six million, five hundred sixty thousand, four hundred twenty-nine".