667367121007079 has 2 divisors, whose sum is σ = 667367121007080. Its totient is φ = 667367121007078.

The previous prime is 667367121007019. The next prime is 667367121007099. The reversal of 667367121007079 is 970700121763766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667367121007079 - 2¹² = 667367121002983 is a prime.

It is a super-2 number, since 2×667367121007079² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667367121007019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333683560503539 + 333683560503540.

It is an arithmetic number, because the mean of its divisors is an integer number (333683560503540).

Almost surely, 2^{667367121007079} is an apocalyptic number.

667367121007079 is a deficient number, since it is larger than the sum of its proper divisors (1).

667367121007079 is an equidigital number, since it uses as much as digits as its factorization.

667367121007079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28005264, while the sum is 62.

The spelling of 667367121007079 in words is "six hundred sixty-seven trillion, three hundred sixty-seven billion, one hundred twenty-one million, seven thousand, seventy-nine".