7286666809 has 2 divisors, whose sum is σ = 7286666810. Its totient is φ = 7286666808.

The previous prime is 7286666791. The next prime is 7286666833. The reversal of 7286666809 is 9086666827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5610010000 + 1676656809 = 74900^2 + 40947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7286666809 is a prime.

It is not a weakly prime, because it can be changed into another prime (7286666879) 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 as a sum of consecutive naturals, namely, 3643333404 + 3643333405.

It is an arithmetic number, because the mean of its divisors is an integer number (3643333405).

Almost surely, 2^7286666809 is an apocalyptic number.

It is an amenable number.

7286666809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7286666809 is an equidigital number, since it uses as much as digits as its factorization.

7286666809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The square root of 7286666809 is about 85361.9751938766. The cubic root of 7286666809 is about 1938.6956557172.

The spelling of 7286666809 in words is "seven billion, two hundred eighty-six million, six hundred sixty-six thousand, eight hundred nine".