667406554387207 has 2 divisors, whose sum is σ = 667406554387208. Its totient is φ = 667406554387206.

The previous prime is 667406554387187. The next prime is 667406554387211. The reversal of 667406554387207 is 702783455604766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667406554387207 - 2¹⁵ = 667406554354439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667406554367207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333703277193603 + 333703277193604.

It is an arithmetic number, because the mean of its divisors is an integer number (333703277193604).

Almost surely, 2^{667406554387207} is an apocalyptic number.

667406554387207 is a deficient number, since it is larger than the sum of its proper divisors (1).

667406554387207 is an equidigital number, since it uses as much as digits as its factorization.

667406554387207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1422489600, while the sum is 70.

The spelling of 667406554387207 in words is "six hundred sixty-seven trillion, four hundred six billion, five hundred fifty-four million, three hundred eighty-seven thousand, two hundred seven".