667340017 has 2 divisors, whose sum is σ = 667340018. Its totient is φ = 667340016.

The previous prime is 667339999. The next prime is 667340071. The reversal of 667340017 is 710043766.

Together with next prime (667340071) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666878976 + 461041 = 25824^2 + 679^2 .

It is a cyclic number.

It is not a de Polignac number, because 667340017 - 2²³ = 658951409 is a prime.

It is not a weakly prime, because it can be changed into another prime (667340417) 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, 333670008 + 333670009.

It is an arithmetic number, because the mean of its divisors is an integer number (333670009).

Almost surely, 2^667340017 is an apocalyptic number.

It is an amenable number.

667340017 is a deficient number, since it is larger than the sum of its proper divisors (1).

667340017 is an equidigital number, since it uses as much as digits as its factorization.

667340017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 667340017 is about 25832.9250569888. The cubic root of 667340017 is about 873.8744786199.

The spelling of 667340017 in words is "six hundred sixty-seven million, three hundred forty thousand, seventeen".