5206660009 has 4 divisors (see below), whose sum is σ = 5233637716. Its totient is φ = 5179682304.

The previous prime is 5206660001. The next prime is 5206660051. The reversal of 5206660009 is 9000666025.

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 2864390400 + 2342269609 = 53520^2 + 48397^2 .

It is a cyclic number.

It is not a de Polignac number, because 5206660009 - 2³ = 5206660001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5206660001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13488564 + ... + 13488949.

It is an arithmetic number, because the mean of its divisors is an integer number (1308409429).

Almost surely, 2^5206660009 is an apocalyptic number.

It is an amenable number.

5206660009 is a deficient number, since it is larger than the sum of its proper divisors (26977707).

5206660009 is a wasteful number, since it uses less digits than its factorization.

5206660009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26977706.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 5206660009 is about 72157.1895863468. The cubic root of 5206660009 is about 1733.2175310661.

The spelling of 5206660009 in words is "five billion, two hundred six million, six hundred sixty thousand, nine".