66230189 has 4 divisors (see below), whose sum is σ = 66274656. Its totient is φ = 66185724.

The previous prime is 66230173. The next prime is 66230209. The reversal of 66230189 is 98103266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98103266 = 2 ⋅49051633.

It is a cyclic number.

It is not a de Polignac number, because 66230189 - 2⁴ = 66230173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66230089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19919 + ... + 23004.

It is an arithmetic number, because the mean of its divisors is an integer number (16568664).

Almost surely, 2^66230189 is an apocalyptic number.

It is an amenable number.

66230189 is a deficient number, since it is larger than the sum of its proper divisors (44467).

66230189 is a wasteful number, since it uses less digits than its factorization.

66230189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44466.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 66230189 is about 8138.1932270007. The cubic root of 66230189 is about 404.5932796428.

The spelling of 66230189 in words is "sixty-six million, two hundred thirty thousand, one hundred eighty-nine".