66200513 has 4 divisors (see below), whose sum is σ = 66232320. Its totient is φ = 66168708.

The previous prime is 66200501. The next prime is 66200549. The reversal of 66200513 is 31500266.

66200513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66200513 - 2²⁰ = 65151937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66200573) 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 3 ways as a sum of consecutive naturals, for example, 12545 + ... + 17022.

It is an arithmetic number, because the mean of its divisors is an integer number (16558080).

Almost surely, 2^66200513 is an apocalyptic number.

It is an amenable number.

66200513 is a deficient number, since it is larger than the sum of its proper divisors (31807).

66200513 is a wasteful number, since it uses less digits than its factorization.

66200513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31806.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 66200513 is about 8136.3697679002. The cubic root of 66200513 is about 404.5328414242.

Adding to 66200513 its reverse (31500266), we get a palindrome (97700779).

The spelling of 66200513 in words is "sixty-six million, two hundred thousand, five hundred thirteen".