66332246413 has 2 divisors, whose sum is σ = 66332246414. Its totient is φ = 66332246412.

The previous prime is 66332246363. The next prime is 66332246419. The reversal of 66332246413 is 31464223366.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39410984484 + 26921261929 = 198522^2 + 164077^2 .

It is a cyclic number.

It is not a de Polignac number, because 66332246413 - 2¹³ = 66332238221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66332246419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33166123206 + 33166123207.

It is an arithmetic number, because the mean of its divisors is an integer number (33166123207).

Almost surely, 2^66332246413 is an apocalyptic number.

It is an amenable number.

66332246413 is a deficient number, since it is larger than the sum of its proper divisors (1).

66332246413 is an equidigital number, since it uses as much as digits as its factorization.

66332246413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 40.

Adding to 66332246413 its reverse (31464223366), we get a palindrome (97796469779).

The spelling of 66332246413 in words is "sixty-six billion, three hundred thirty-two million, two hundred forty-six thousand, four hundred thirteen".