6466475882221 has 2 divisors, whose sum is σ = 6466475882222. Its totient is φ = 6466475882220.

The previous prime is 6466475882149. The next prime is 6466475882239. The reversal of 6466475882221 is 1222885746646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4707706575625 + 1758769306596 = 2169725^2 + 1326186^2 .

It is a cyclic number.

It is not a de Polignac number, because 6466475882221 - 2⁷ = 6466475882093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6466475882221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6466475888221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3233237941110 + 3233237941111.

It is an arithmetic number, because the mean of its divisors is an integer number (3233237941111).

Almost surely, 2^{6466475882221} is an apocalyptic number.

It is an amenable number.

6466475882221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6466475882221 is an equidigital number, since it uses as much as digits as its factorization.

6466475882221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61931520, while the sum is 61.

The spelling of 6466475882221 in words is "six trillion, four hundred sixty-six billion, four hundred seventy-five million, eight hundred eighty-two thousand, two hundred twenty-one".