66500012 has 12 divisors (see below), whose sum is σ = 116437776. Its totient is φ = 33232080.

The previous prime is 66500011. The next prime is 66500017. The reversal of 66500012 is 21000566.

It is not an unprimeable number, because it can be changed into a prime (66500011) 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, 7313 + ... + 13655.

It is an arithmetic number, because the mean of its divisors is an integer number (9703148).

Almost surely, 2^66500012 is an apocalyptic number.

It is an amenable number.

66500012 is a deficient number, since it is larger than the sum of its proper divisors (49937764).

66500012 is a wasteful number, since it uses less digits than its factorization.

66500012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8968 (or 8966 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 66500012 is about 8154.7539509172. The cubic root of 66500012 is about 405.1419753216.

Adding to 66500012 its reverse (21000566), we get a palindrome (87500578).

The spelling of 66500012 in words is "sixty-six million, five hundred thousand, twelve".