66343187 has 2 divisors, whose sum is σ = 66343188. Its totient is φ = 66343186.

The previous prime is 66343159. The next prime is 66343223. The reversal of 66343187 is 78134366.

66343187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66343187 - 2¹⁴ = 66326803 is a prime.

It is a super-2 number, since 2×66343187² = 8802836922633938, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66343187.

It is not a weakly prime, because it can be changed into another prime (66343127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33171593 + 33171594.

It is an arithmetic number, because the mean of its divisors is an integer number (33171594).

Almost surely, 2^66343187 is an apocalyptic number.

66343187 is a deficient number, since it is larger than the sum of its proper divisors (1).

66343187 is an equidigital number, since it uses as much as digits as its factorization.

66343187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 66343187 is about 8145.1327183785. The cubic root of 66343187 is about 404.8232465514.

The spelling of 66343187 in words is "sixty-six million, three hundred forty-three thousand, one hundred eighty-seven".