66025187 has 2 divisors, whose sum is σ = 66025188. Its totient is φ = 66025186.

The previous prime is 66025153. The next prime is 66025207. The reversal of 66025187 is 78152066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66025187 - 2¹⁰ = 66024163 is a prime.

It is not a weakly prime, because it can be changed into another prime (66025117) 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, 33012593 + 33012594.

It is an arithmetic number, because the mean of its divisors is an integer number (33012594).

Almost surely, 2^66025187 is an apocalyptic number.

66025187 is a deficient number, since it is larger than the sum of its proper divisors (1).

66025187 is an equidigital number, since it uses as much as digits as its factorization.

66025187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 66025187 is about 8125.5884094630. The cubic root of 66025187 is about 404.1754029547.

The spelling of 66025187 in words is "sixty-six million, twenty-five thousand, one hundred eighty-seven".