66415012 has 12 divisors (see below), whose sum is σ = 116363520. Its totient is φ = 33168296.

The previous prime is 66415001. The next prime is 66415043. The reversal of 66415012 is 21051466.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5812 + ... + 12907.

It is an arithmetic number, because the mean of its divisors is an integer number (9696960).

Almost surely, 2^66415012 is an apocalyptic number.

It is an amenable number.

66415012 is a deficient number, since it is larger than the sum of its proper divisors (49948508).

66415012 is a wasteful number, since it uses less digits than its factorization.

66415012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19610 (or 19608 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 66415012 is about 8149.5406005492. The cubic root of 66415012 is about 404.9692848728.

Adding to 66415012 its reverse (21051466), we get a palindrome (87466478).

The spelling of 66415012 in words is "sixty-six million, four hundred fifteen thousand, twelve".