1667421924473 has 2 divisors, whose sum is σ = 1667421924474. Its totient is φ = 1667421924472.

The previous prime is 1667421924463. The next prime is 1667421924529. The reversal of 1667421924473 is 3744291247661.

It is an a-pointer prime, because the next prime (1667421924529) can be obtained adding 1667421924473 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177034047744 + 490387876729 = 1084912^2 + 700277^2 .

It is a cyclic number.

It is not a de Polignac number, because 1667421924473 - 2¹⁰ = 1667421923449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1667421924463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833710962236 + 833710962237.

It is an arithmetic number, because the mean of its divisors is an integer number (833710962237).

Almost surely, 2^{1667421924473} is an apocalyptic number.

It is an amenable number.

1667421924473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667421924473 is an equidigital number, since it uses as much as digits as its factorization.

1667421924473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 56.

The spelling of 1667421924473 in words is "one trillion, six hundred sixty-seven billion, four hundred twenty-one million, nine hundred twenty-four thousand, four hundred seventy-three".