667635734110117 has 2 divisors, whose sum is σ = 667635734110118. Its totient is φ = 667635734110116.

The previous prime is 667635734110097. The next prime is 667635734110183. The reversal of 667635734110117 is 711011437536766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443983290369921 + 223652443740196 = 21070911^2 + 14955014^2 .

It is a cyclic number.

It is not a de Polignac number, because 667635734110117 - 2⁴³ = 658839641087909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667635734110517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333817867055058 + 333817867055059.

It is an arithmetic number, because the mean of its divisors is an integer number (333817867055059).

Almost surely, 2^{667635734110117} is an apocalyptic number.

It is an amenable number.

667635734110117 is a deficient number, since it is larger than the sum of its proper divisors (1).

667635734110117 is an equidigital number, since it uses as much as digits as its factorization.

667635734110117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13335840, while the sum is 58.

The spelling of 667635734110117 in words is "six hundred sixty-seven trillion, six hundred thirty-five billion, seven hundred thirty-four million, one hundred ten thousand, one hundred seventeen".