66448133 has 2 divisors, whose sum is σ = 66448134. Its totient is φ = 66448132.

The previous prime is 66448069. The next prime is 66448147. The reversal of 66448133 is 33184466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62995969 + 3452164 = 7937^2 + 1858^2 .

It is a cyclic number.

It is not a de Polignac number, because 66448133 - 2⁶ = 66448069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66448093 and 66448102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66448153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33224066 + 33224067.

It is an arithmetic number, because the mean of its divisors is an integer number (33224067).

Almost surely, 2^66448133 is an apocalyptic number.

It is an amenable number.

66448133 is a deficient number, since it is larger than the sum of its proper divisors (1).

66448133 is an equidigital number, since it uses as much as digits as its factorization.

66448133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

The square root of 66448133 is about 8151.5724249987. The cubic root of 66448133 is about 405.0365927410.

The spelling of 66448133 in words is "sixty-six million, four hundred forty-eight thousand, one hundred thirty-three".