66065563 has 8 divisors (see below), whose sum is σ = 67021056. Its totient is φ = 65116800.

The previous prime is 66065533. The next prime is 66065569. The reversal of 66065563 is 36556066.

It is a happy number.

66065563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66065563 is a prime.

It is a super-2 number, since 2×66065563² = 8729317229013938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66065569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20053 + ... + 23113.

It is an arithmetic number, because the mean of its divisors is an integer number (8377632).

Almost surely, 2^66065563 is an apocalyptic number.

66065563 is a deficient number, since it is larger than the sum of its proper divisors (955493).

66065563 is a wasteful number, since it uses less digits than its factorization.

66065563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 66065563 is about 8128.0725267433. The cubic root of 66065563 is about 404.2577738471.

The spelling of 66065563 in words is "sixty-six million, sixty-five thousand, five hundred sixty-three".