1670201866789 has 2 divisors, whose sum is σ = 1670201866790. Its totient is φ = 1670201866788.

The previous prime is 1670201866691. The next prime is 1670201866793. The reversal of 1670201866789 is 9876681020761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1391534014689 + 278667852100 = 1179633^2 + 527890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670201866789 - 2²⁵ = 1670168312357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670201861789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835100933394 + 835100933395.

It is an arithmetic number, because the mean of its divisors is an integer number (835100933395).

Almost surely, 2^{1670201866789} is an apocalyptic number.

It is an amenable number.

1670201866789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670201866789 is an equidigital number, since it uses as much as digits as its factorization.

1670201866789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 1670201866789 in words is "one trillion, six hundred seventy billion, two hundred one million, eight hundred sixty-six thousand, seven hundred eighty-nine".