66273533 has 2 divisors, whose sum is σ = 66273534. Its totient is φ = 66273532.

The previous prime is 66273523. The next prime is 66273547. The reversal of 66273533 is 33537266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57729604 + 8543929 = 7598^2 + 2923^2 .

It is a cyclic number.

It is not a de Polignac number, because 66273533 - 2⁴ = 66273517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66273493 and 66273502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66273503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33136766 + 33136767.

It is an arithmetic number, because the mean of its divisors is an integer number (33136767).

Almost surely, 2^66273533 is an apocalyptic number.

It is an amenable number.

66273533 is a deficient number, since it is larger than the sum of its proper divisors (1).

66273533 is an equidigital number, since it uses as much as digits as its factorization.

66273533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 35.

The square root of 66273533 is about 8140.8557903945. The cubic root of 66273533 is about 404.6815217127.

The spelling of 66273533 in words is "sixty-six million, two hundred seventy-three thousand, five hundred thirty-three".