667004917 has 2 divisors, whose sum is σ = 667004918. Its totient is φ = 667004916.

The previous prime is 667004887. The next prime is 667004929. The reversal of 667004917 is 719400766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665691601 + 1313316 = 25801^2 + 1146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667004917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667004917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667004977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333502458 + 333502459.

It is an arithmetic number, because the mean of its divisors is an integer number (333502459).

Almost surely, 2^667004917 is an apocalyptic number.

It is an amenable number.

667004917 is a deficient number, since it is larger than the sum of its proper divisors (1).

667004917 is an equidigital number, since it uses as much as digits as its factorization.

667004917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 667004917 is about 25826.4383336146. The cubic root of 667004917 is about 873.7281841977.

It can be divided in two parts, 66700 and 4917, that added together give a palindrome (71617).

The spelling of 667004917 in words is "six hundred sixty-seven million, four thousand, nine hundred seventeen".