66243433 has 2 divisors, whose sum is σ = 66243434. Its totient is φ = 66243432.

The previous prime is 66243421. The next prime is 66243439. The reversal of 66243433 is 33434266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62678889 + 3564544 = 7917^2 + 1888^2 .

It is a cyclic number.

It is not a de Polignac number, because 66243433 - 2¹³ = 66235241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66243395 and 66243404.

It is not a weakly prime, because it can be changed into another prime (66243439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33121716 + 33121717.

It is an arithmetic number, because the mean of its divisors is an integer number (33121717).

Almost surely, 2^66243433 is an apocalyptic number.

It is an amenable number.

66243433 is a deficient number, since it is larger than the sum of its proper divisors (1).

66243433 is an equidigital number, since it uses as much as digits as its factorization.

66243433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 31.

The square root of 66243433 is about 8139.0068804492. The cubic root of 66243433 is about 404.6202465811.

Adding to 66243433 its reverse (33434266), we get a palindrome (99677699).

The spelling of 66243433 in words is "sixty-six million, two hundred forty-three thousand, four hundred thirty-three".