1669850905939 has 2 divisors, whose sum is σ = 1669850905940. Its totient is φ = 1669850905938.

The previous prime is 1669850905927. The next prime is 1669850905949. The reversal of 1669850905939 is 9395090589661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1669850905939 - 2¹³ = 1669850897747 is a prime.

It is not a weakly prime, because it can be changed into another prime (1669850905949) 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, 834925452969 + 834925452970.

It is an arithmetic number, because the mean of its divisors is an integer number (834925452970).

Almost surely, 2^{1669850905939} is an apocalyptic number.

1669850905939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669850905939 is an equidigital number, since it uses as much as digits as its factorization.

1669850905939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141717600, while the sum is 70.

The spelling of 1669850905939 in words is "one trillion, six hundred sixty-nine billion, eight hundred fifty million, nine hundred five thousand, nine hundred thirty-nine".