66433624069 has 2 divisors, whose sum is σ = 66433624070. Its totient is φ = 66433624068.

The previous prime is 66433624039. The next prime is 66433624073. The reversal of 66433624069 is 96042633466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51540350625 + 14893273444 = 227025^2 + 122038^2 .

It is a cyclic number.

It is not a de Polignac number, because 66433624069 - 2⁷ = 66433623941 is a prime.

It is a super-2 number, since 2×66433624069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66433624039) 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, 33216812034 + 33216812035.

It is an arithmetic number, because the mean of its divisors is an integer number (33216812035).

Almost surely, 2^66433624069 is an apocalyptic number.

It is an amenable number.

66433624069 is a deficient number, since it is larger than the sum of its proper divisors (1).

66433624069 is an equidigital number, since it uses as much as digits as its factorization.

66433624069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 49.

The spelling of 66433624069 in words is "sixty-six billion, four hundred thirty-three million, six hundred twenty-four thousand, sixty-nine".