6671071073621 has 2 divisors, whose sum is σ = 6671071073622. Its totient is φ = 6671071073620.

The previous prime is 6671071073543. The next prime is 6671071073633. The reversal of 6671071073621 is 1263701701766.

6671071073621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6365882224900 + 305188848721 = 2523070^2 + 552439^2 .

It is a cyclic number.

It is not a de Polignac number, because 6671071073621 - 2¹⁰ = 6671071072597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6671071073651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3335535536810 + 3335535536811.

It is an arithmetic number, because the mean of its divisors is an integer number (3335535536811).

Almost surely, 2^{6671071073621} is an apocalyptic number.

It is an amenable number.

6671071073621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6671071073621 is an equidigital number, since it uses as much as digits as its factorization.

6671071073621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 47.

The spelling of 6671071073621 in words is "six trillion, six hundred seventy-one billion, seventy-one million, seventy-three thousand, six hundred twenty-one".