6674666167621 has 2 divisors, whose sum is σ = 6674666167622. Its totient is φ = 6674666167620.

The previous prime is 6674666167571. The next prime is 6674666167651. The reversal of 6674666167621 is 1267616664766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5864684167521 + 809982000100 = 2421711^2 + 899990^2 .

It is a cyclic number.

It is not a de Polignac number, because 6674666167621 - 2⁷ = 6674666167493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6674666167651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3337333083810 + 3337333083811.

It is an arithmetic number, because the mean of its divisors is an integer number (3337333083811).

Almost surely, 2^{6674666167621} is an apocalyptic number.

It is an amenable number.

6674666167621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6674666167621 is an equidigital number, since it uses as much as digits as its factorization.

6674666167621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109734912, while the sum is 64.

The spelling of 6674666167621 in words is "six trillion, six hundred seventy-four billion, six hundred sixty-six million, one hundred sixty-seven thousand, six hundred twenty-one".