66512230 has 8 divisors (see below), whose sum is σ = 119722032. Its totient is φ = 26604888.

The previous prime is 66512227. The next prime is 66512231. The reversal of 66512230 is 3221566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66512195 and 66512204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66512231) 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, 3325602 + ... + 3325621.

It is an arithmetic number, because the mean of its divisors is an integer number (14965254).

Almost surely, 2^66512230 is an apocalyptic number.

66512230 is a deficient number, since it is larger than the sum of its proper divisors (53209802).

66512230 is a wasteful number, since it uses less digits than its factorization.

66512230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6651230.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66512230 is about 8155.5030500883. The cubic root of 66512230 is about 405.1667859514.

Adding to 66512230 its reverse (3221566), we get a palindrome (69733796).

The spelling of 66512230 in words is "sixty-six million, five hundred twelve thousand, two hundred thirty".