66505462417 has 2 divisors, whose sum is σ = 66505462418. Its totient is φ = 66505462416.

The previous prime is 66505462333. The next prime is 66505462483. The reversal of 66505462417 is 71426450566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66390736896 + 114725521 = 257664^2 + 10711^2 .

It is a cyclic number.

It is not a de Polignac number, because 66505462417 - 2¹¹ = 66505460369 is a prime.

It is not a weakly prime, because it can be changed into another prime (66505462487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33252731208 + 33252731209.

It is an arithmetic number, because the mean of its divisors is an integer number (33252731209).

Almost surely, 2^66505462417 is an apocalyptic number.

It is an amenable number.

66505462417 is a deficient number, since it is larger than the sum of its proper divisors (1).

66505462417 is an equidigital number, since it uses as much as digits as its factorization.

66505462417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 66505462417 in words is "sixty-six billion, five hundred five million, four hundred sixty-two thousand, four hundred seventeen".