66480604666 has 24 divisors (see below), whose sum is σ = 116090849376. Its totient is φ = 28469833560.

The previous prime is 66480604661. The next prime is 66480604681. The reversal of 66480604666 is 66640608466.

It is not an unprimeable number, because it can be changed into a prime (66480604661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131430 + ... + 387601.

It is an arithmetic number, because the mean of its divisors is an integer number (4837118724).

Almost surely, 2^66480604666 is an apocalyptic number.

66480604666 is a deficient number, since it is larger than the sum of its proper divisors (49610244710).

66480604666 is a wasteful number, since it uses less digits than its factorization.

66480604666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520354 (or 520347 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 52.

The spelling of 66480604666 in words is "sixty-six billion, four hundred eighty million, six hundred four thousand, six hundred sixty-six".