66915116 has 12 divisors (see below), whose sum is σ = 119957880. Its totient is φ = 32641440.

The previous prime is 66915113. The next prime is 66915137. The reversal of 66915116 is 61151966.

It is not an unprimeable number, because it can be changed into a prime (66915113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203846 + ... + 204173.

It is an arithmetic number, because the mean of its divisors is an integer number (9996490).

Almost surely, 2^66915116 is an apocalyptic number.

It is an amenable number.

66915116 is a deficient number, since it is larger than the sum of its proper divisors (53042764).

66915116 is a wasteful number, since it uses less digits than its factorization.

66915116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408064 (or 408062 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 66915116 is about 8180.1660129853. The cubic root of 66915116 is about 405.9832149467.

The spelling of 66915116 in words is "sixty-six million, nine hundred fifteen thousand, one hundred sixteen".