566667009 has 18 divisors (see below), whose sum is σ = 849967170. Its totient is φ = 377773632.

The previous prime is 566666993. The next prime is 566667019. The reversal of 566667009 is 900766665.

It can be written as a sum of positive squares in only one way, i.e., 443523600 + 123143409 = 21060^2 + 11097^2 .

It is not a de Polignac number, because 566667009 - 2⁴ = 566666993 is a prime.

It is a super-2 number, since 2×566667009² = 642222998178012162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (566667019) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36624 + ... + 49745.

Almost surely, 2^566667009 is an apocalyptic number.

It is an amenable number.

566667009 is a deficient number, since it is larger than the sum of its proper divisors (283300161).

566667009 is an frugal number, since it uses more digits than its factorization.

566667009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86393 (or 86372 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 566667009 is about 23804.7686189133. The cubic root of 566667009 is about 827.5151935096.

The spelling of 566667009 in words is "five hundred sixty-six million, six hundred sixty-seven thousand, nine".