1667194007201 has 2 divisors, whose sum is σ = 1667194007202. Its totient is φ = 1667194007200.

The previous prime is 1667194007197. The next prime is 1667194007203. The reversal of 1667194007201 is 1027004917661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1337258647201 + 329935360000 = 1156399^2 + 574400^2 .

It is an emirp because it is prime and its reverse (1027004917661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1667194007201 - 2² = 1667194007197 is a prime.

Together with 1667194007203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1667194007203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833597003600 + 833597003601.

It is an arithmetic number, because the mean of its divisors is an integer number (833597003601).

Almost surely, 2^{1667194007201} is an apocalyptic number.

It is an amenable number.

1667194007201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667194007201 is an equidigital number, since it uses as much as digits as its factorization.

1667194007201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 1667194007201 in words is "one trillion, six hundred sixty-seven billion, one hundred ninety-four million, seven thousand, two hundred one".