66055560481 has 2 divisors, whose sum is σ = 66055560482. Its totient is φ = 66055560480.

The previous prime is 66055560457. The next prime is 66055560511. The reversal of 66055560481 is 18406555066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64239437025 + 1816123456 = 253455^2 + 42616^2 .

It is a cyclic number.

It is not a de Polignac number, because 66055560481 - 2⁵ = 66055560449 is a prime.

It is a super-2 number, since 2×66055560481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66055560581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33027780240 + 33027780241.

It is an arithmetic number, because the mean of its divisors is an integer number (33027780241).

Almost surely, 2^66055560481 is an apocalyptic number.

It is an amenable number.

66055560481 is a deficient number, since it is larger than the sum of its proper divisors (1).

66055560481 is an equidigital number, since it uses as much as digits as its factorization.

66055560481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 66055560481 in words is "sixty-six billion, fifty-five million, five hundred sixty thousand, four hundred eighty-one".