1667344056871 has 2 divisors, whose sum is σ = 1667344056872. Its totient is φ = 1667344056870.

The previous prime is 1667344056863. The next prime is 1667344056977. The reversal of 1667344056871 is 1786504437661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1667344056871 - 2³ = 1667344056863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1667344056841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833672028435 + 833672028436.

It is an arithmetic number, because the mean of its divisors is an integer number (833672028436).

Almost surely, 2^{1667344056871} is an apocalyptic number.

1667344056871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667344056871 is an equidigital number, since it uses as much as digits as its factorization.

1667344056871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 1667344056871 in words is "one trillion, six hundred sixty-seven billion, three hundred forty-four million, fifty-six thousand, eight hundred seventy-one".