7286666857 has 2 divisors, whose sum is σ = 7286666858. Its totient is φ = 7286666856.

The previous prime is 7286666851. The next prime is 7286666873. The reversal of 7286666857 is 7586666827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6603837696 + 682829161 = 81264^2 + 26131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7286666857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7286666795 and 7286666804.

It is not a weakly prime, because it can be changed into another prime (7286666851) 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, 3643333428 + 3643333429.

It is an arithmetic number, because the mean of its divisors is an integer number (3643333429).

Almost surely, 2^7286666857 is an apocalyptic number.

It is an amenable number.

7286666857 is a deficient number, since it is larger than the sum of its proper divisors (1).

7286666857 is an equidigital number, since it uses as much as digits as its factorization.

7286666857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 61.

The square root of 7286666857 is about 85361.9754750322. The cubic root of 7286666857 is about 1938.6956599742.

The spelling of 7286666857 in words is "seven billion, two hundred eighty-six million, six hundred sixty-six thousand, eight hundred fifty-seven".