66334443361 has 2 divisors, whose sum is σ = 66334443362. Its totient is φ = 66334443360.

The previous prime is 66334443353. The next prime is 66334443389. The reversal of 66334443361 is 16334443366.

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., 61214182225 + 5120261136 = 247415^2 + 71556^2 .

It is a cyclic number.

It is not a de Polignac number, because 66334443361 - 2³ = 66334443353 is a prime.

It is not a weakly prime, because it can be changed into another prime (66334443391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33167221680 + 33167221681.

It is an arithmetic number, because the mean of its divisors is an integer number (33167221681).

Almost surely, 2^66334443361 is an apocalyptic number.

It is an amenable number.

66334443361 is a deficient number, since it is larger than the sum of its proper divisors (1).

66334443361 is an equidigital number, since it uses as much as digits as its factorization.

66334443361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 43.

The spelling of 66334443361 in words is "sixty-six billion, three hundred thirty-four million, four hundred forty-three thousand, three hundred sixty-one".