66484044413 has 2 divisors, whose sum is σ = 66484044414. Its totient is φ = 66484044412.

The previous prime is 66484044409. The next prime is 66484044437. The reversal of 66484044413 is 31444048466.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55226410009 + 11257634404 = 235003^2 + 106102^2 .

It is a cyclic number.

It is not a de Polignac number, because 66484044413 - 2² = 66484044409 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66484044443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33242022206 + 33242022207.

It is an arithmetic number, because the mean of its divisors is an integer number (33242022207).

Almost surely, 2^66484044413 is an apocalyptic number.

It is an amenable number.

66484044413 is a deficient number, since it is larger than the sum of its proper divisors (1).

66484044413 is an equidigital number, since it uses as much as digits as its factorization.

66484044413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 884736, while the sum is 44.

The spelling of 66484044413 in words is "sixty-six billion, four hundred eighty-four million, forty-four thousand, four hundred thirteen".