1667167271249 has 2 divisors, whose sum is σ = 1667167271250. Its totient is φ = 1667167271248.

The previous prime is 1667167271239. The next prime is 1667167271317. The reversal of 1667167271249 is 9421727617661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1666952121025 + 215150224 = 1291105^2 + 14668^2 .

It is an emirp because it is prime and its reverse (9421727617661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1667167271249 - 2¹⁶ = 1667167205713 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1667167271239) 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, 833583635624 + 833583635625.

It is an arithmetic number, because the mean of its divisors is an integer number (833583635625).

Almost surely, 2^{1667167271249} is an apocalyptic number.

It is an amenable number.

1667167271249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667167271249 is an equidigital number, since it uses as much as digits as its factorization.

1667167271249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 59.

The spelling of 1667167271249 in words is "one trillion, six hundred sixty-seven billion, one hundred sixty-seven million, two hundred seventy-one thousand, two hundred forty-nine".