1669850909939 has 2 divisors, whose sum is σ = 1669850909940. Its totient is φ = 1669850909938.

The previous prime is 1669850909917. The next prime is 1669850910011. The reversal of 1669850909939 is 9399090589661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1669850909939 is a prime.

It is a super-2 number, since 2×1669850909939² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1669850905939) 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, 834925454969 + 834925454970.

It is an arithmetic number, because the mean of its divisors is an integer number (834925454970).

Almost surely, 2^{1669850909939} is an apocalyptic number.

1669850909939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669850909939 is an equidigital number, since it uses as much as digits as its factorization.

1669850909939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 255091680, while the sum is 74.

The spelling of 1669850909939 in words is "one trillion, six hundred sixty-nine billion, eight hundred fifty million, nine hundred nine thousand, nine hundred thirty-nine".