7318666668137 has 6 divisors (see below), whose sum is σ = 8044484850234. Its totient is φ = 6653333334560.

The previous prime is 7318666668133. The next prime is 7318666668199.

7318666668137 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 7065118164841 + 253548503296 = 2658029^2 + 503536^2 .

It is not a de Polignac number, because 7318666668137 - 2² = 7318666668133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7318666668133) 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 in 5 ways as a sum of consecutive naturals, for example, 30242424128 + ... + 30242424369.

It is an arithmetic number, because the mean of its divisors is an integer number (1340747475039).

Almost surely, 2^{7318666668137} is an apocalyptic number.

It is an amenable number.

7318666668137 is a deficient number, since it is larger than the sum of its proper divisors (725818182097).

7318666668137 is a wasteful number, since it uses less digits than its factorization.

7318666668137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60484848519 (or 60484848508 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 68.

The spelling of 7318666668137 in words is "seven trillion, three hundred eighteen billion, six hundred sixty-six million, six hundred sixty-eight thousand, one hundred thirty-seven".