66525143 has 2 divisors, whose sum is σ = 66525144. Its totient is φ = 66525142.

The previous prime is 66525133. The next prime is 66525161. The reversal of 66525143 is 34152566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66525143 - 2⁶ = 66525079 is a prime.

It is a Sophie Germain prime.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33262571 + 33262572.

It is an arithmetic number, because the mean of its divisors is an integer number (33262572).

Almost surely, 2^66525143 is an apocalyptic number.

66525143 is a deficient number, since it is larger than the sum of its proper divisors (1).

66525143 is an equidigital number, since it uses as much as digits as its factorization.

66525143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 32.

The square root of 66525143 is about 8156.2946857013. The cubic root of 66525143 is about 405.1930045890.

The spelling of 66525143 in words is "sixty-six million, five hundred twenty-five thousand, one hundred forty-three".