63466555261 has 2 divisors, whose sum is σ = 63466555262. Its totient is φ = 63466555260.

The previous prime is 63466555259. The next prime is 63466555309. The reversal of 63466555261 is 16255566436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53430322500 + 10036232761 = 231150^2 + 100181^2 .

It is a cyclic number.

It is not a de Polignac number, because 63466555261 - 2¹ = 63466555259 is a prime.

Together with 63466555259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63466555241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31733277630 + 31733277631.

It is an arithmetic number, because the mean of its divisors is an integer number (31733277631).

Almost surely, 2^63466555261 is an apocalyptic number.

It is an amenable number.

63466555261 is a deficient number, since it is larger than the sum of its proper divisors (1).

63466555261 is an equidigital number, since it uses as much as digits as its factorization.

63466555261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 49.

The spelling of 63466555261 in words is "sixty-three billion, four hundred sixty-six million, five hundred fifty-five thousand, two hundred sixty-one".