66433624549 has 2 divisors, whose sum is σ = 66433624550. Its totient is φ = 66433624548.

The previous prime is 66433624483. The next prime is 66433624567. The reversal of 66433624549 is 94542633466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49277340225 + 17156284324 = 221985^2 + 130982^2 .

It is a cyclic number.

It is not a de Polignac number, because 66433624549 - 2²⁵ = 66400070117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66433624496 and 66433624505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66433627549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33216812274 + 33216812275.

It is an arithmetic number, because the mean of its divisors is an integer number (33216812275).

Almost surely, 2^66433624549 is an apocalyptic number.

It is an amenable number.

66433624549 is a deficient number, since it is larger than the sum of its proper divisors (1).

66433624549 is an equidigital number, since it uses as much as digits as its factorization.

66433624549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11197440, while the sum is 52.

The spelling of 66433624549 in words is "sixty-six billion, four hundred thirty-three million, six hundred twenty-four thousand, five hundred forty-nine".