5664100667021 has 2 divisors, whose sum is σ = 5664100667022. Its totient is φ = 5664100667020.

The previous prime is 5664100666981. The next prime is 5664100667023. The reversal of 5664100667021 is 1207660014665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5153467515625 + 510633151396 = 2270125^2 + 714586^2 .

It is a cyclic number.

It is not a de Polignac number, because 5664100667021 - 2¹⁰ = 5664100665997 is a prime.

It is a super-2 number, since 2×5664100667021² (a number of 26 digits) contains 22 as substring.

Together with 5664100667023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5664100667023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832050333510 + 2832050333511.

It is an arithmetic number, because the mean of its divisors is an integer number (2832050333511).

Almost surely, 2^{5664100667021} is an apocalyptic number.

It is an amenable number.

5664100667021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5664100667021 is an equidigital number, since it uses as much as digits as its factorization.

5664100667021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 5664100667021 in words is "five trillion, six hundred sixty-four billion, one hundred million, six hundred sixty-seven thousand, twenty-one".