6671561453 has 2 divisors, whose sum is σ = 6671561454. Its totient is φ = 6671561452.

The previous prime is 6671561443. The next prime is 6671561459. The reversal of 6671561453 is 3541651766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5553528484 + 1118032969 = 74522^2 + 33437^2 .

It is a cyclic number.

It is not a de Polignac number, because 6671561453 - 2¹⁰ = 6671560429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6671561459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3335780726 + 3335780727.

It is an arithmetic number, because the mean of its divisors is an integer number (3335780727).

Almost surely, 2^6671561453 is an apocalyptic number.

It is an amenable number.

6671561453 is a deficient number, since it is larger than the sum of its proper divisors (1).

6671561453 is an equidigital number, since it uses as much as digits as its factorization.

6671561453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 44.

The square root of 6671561453 is about 81679.6269151617. The cubic root of 6671561453 is about 1882.5325621063.

The spelling of 6671561453 in words is "six billion, six hundred seventy-one million, five hundred sixty-one thousand, four hundred fifty-three".