66517012 has 24 divisors (see below), whose sum is σ = 122443776. Its totient is φ = 31556448.

The previous prime is 66517007. The next prime is 66517019. The reversal of 66517012 is 21071566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66517019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8838 + ... + 14530.

It is an arithmetic number, because the mean of its divisors is an integer number (5101824).

Almost surely, 2^66517012 is an apocalyptic number.

It is an amenable number.

66517012 is a deficient number, since it is larger than the sum of its proper divisors (55926764).

66517012 is a wasteful number, since it uses less digits than its factorization.

66517012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847 (or 5845 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 66517012 is about 8155.7962210933. The cubic root of 66517012 is about 405.1764957503.

Adding to 66517012 its reverse (21071566), we get a palindrome (87588578).

The spelling of 66517012 in words is "sixty-six million, five hundred seventeen thousand, twelve".