66633433 has 2 divisors, whose sum is σ = 66633434. Its totient is φ = 66633432.

The previous prime is 66633407. The next prime is 66633449. The reversal of 66633433 is 33433666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62520649 + 4112784 = 7907^2 + 2028^2 .

It is a cyclic number.

It is not a de Polignac number, because 66633433 - 2⁹ = 66632921 is a prime.

It is not a weakly prime, because it can be changed into another prime (66633233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33316716 + 33316717.

It is an arithmetic number, because the mean of its divisors is an integer number (33316717).

Almost surely, 2^66633433 is an apocalyptic number.

It is an amenable number.

66633433 is a deficient number, since it is larger than the sum of its proper divisors (1).

66633433 is an equidigital number, since it uses as much as digits as its factorization.

66633433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 34.

The square root of 66633433 is about 8162.9304174420. The cubic root of 66633433 is about 405.4127438811.

The spelling of 66633433 in words is "sixty-six million, six hundred thirty-three thousand, four hundred thirty-three".