66525133 has 2 divisors, whose sum is σ = 66525134. Its totient is φ = 66525132.

The previous prime is 66525113. The next prime is 66525143. The reversal of 66525133 is 33152566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59028489 + 7496644 = 7683^2 + 2738^2 .

It is a cyclic number.

It is not a de Polignac number, because 66525133 - 2¹³ = 66516941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66525095 and 66525104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66525113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33262566 + 33262567.

It is an arithmetic number, because the mean of its divisors is an integer number (33262567).

Almost surely, 2^66525133 is an apocalyptic number.

It is an amenable number.

66525133 is a deficient number, since it is larger than the sum of its proper divisors (1).

66525133 is an equidigital number, since it uses as much as digits as its factorization.

66525133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 31.

The square root of 66525133 is about 8156.2940726779. The cubic root of 66525133 is about 405.1929842862.

Adding to 66525133 its reverse (33152566), we get a palindrome (99677699).

The spelling of 66525133 in words is "sixty-six million, five hundred twenty-five thousand, one hundred thirty-three".