1669403974871 has 2 divisors, whose sum is σ = 1669403974872. Its totient is φ = 1669403974870.

The previous prime is 1669403974747. The next prime is 1669403974963. The reversal of 1669403974871 is 1784793049661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1669403974871 - 2²² = 1669399780567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1669403974798 and 1669403974807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1669403974471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834701987435 + 834701987436.

It is an arithmetic number, because the mean of its divisors is an integer number (834701987436).

Almost surely, 2^{1669403974871} is an apocalyptic number.

1669403974871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669403974871 is an equidigital number, since it uses as much as digits as its factorization.

1669403974871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54867456, while the sum is 65.

The spelling of 1669403974871 in words is "one trillion, six hundred sixty-nine billion, four hundred three million, nine hundred seventy-four thousand, eight hundred seventy-one".