6570966221 has 2 divisors, whose sum is σ = 6570966222. Its totient is φ = 6570966220.

The previous prime is 6570966211. The next prime is 6570966223. The reversal of 6570966221 is 1226690756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6282306121 + 288660100 = 79261^2 + 16990^2 .

It is a cyclic number.

It is not a de Polignac number, because 6570966221 - 2²⁶ = 6503857357 is a prime.

Together with 6570966223, 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 (6570966223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3285483110 + 3285483111.

It is an arithmetic number, because the mean of its divisors is an integer number (3285483111).

Almost surely, 2^6570966221 is an apocalyptic number.

It is an amenable number.

6570966221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6570966221 is an equidigital number, since it uses as much as digits as its factorization.

6570966221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 6570966221 is about 81061.4965381222. The cubic root of 6570966221 is about 1873.0228612900.

The spelling of 6570966221 in words is "six billion, five hundred seventy million, nine hundred sixty-six thousand, two hundred twenty-one".