6466860297281 has 2 divisors, whose sum is σ = 6466860297282. Its totient is φ = 6466860297280.

The previous prime is 6466860297257. The next prime is 6466860297361. The reversal of 6466860297281 is 1827920686646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3607663378225 + 2859196919056 = 1899385^2 + 1690916^2 .

It is a cyclic number.

It is not a de Polignac number, because 6466860297281 - 2⁶ = 6466860297217 is a prime.

It is a super-2 number, since 2×6466860297281² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6466860297481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3233430148640 + 3233430148641.

It is an arithmetic number, because the mean of its divisors is an integer number (3233430148641).

Almost surely, 2^{6466860297281} is an apocalyptic number.

It is an amenable number.

6466860297281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6466860297281 is an equidigital number, since it uses as much as digits as its factorization.

6466860297281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 83607552, while the sum is 65.

The spelling of 6466860297281 in words is "six trillion, four hundred sixty-six billion, eight hundred sixty million, two hundred ninety-seven thousand, two hundred eighty-one".