66909706468 has 24 divisors (see below), whose sum is σ = 131857254144. Its totient is φ = 29432421600.

The previous prime is 66909706459. The next prime is 66909706471. The reversal of 66909706468 is 86460790966.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24525655 + ... + 24528382.

It is an arithmetic number, because the mean of its divisors is an integer number (5494052256).

Almost surely, 2^66909706468 is an apocalyptic number.

It is an amenable number.

66909706468 is a deficient number, since it is larger than the sum of its proper divisors (64947547676).

66909706468 is a wasteful number, since it uses less digits than its factorization.

66909706468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49054083 (or 49054081 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 61.

It can be divided in two parts, 66909 and 706468, that added together give a palindrome (773377).

The spelling of 66909706468 in words is "sixty-six billion, nine hundred nine million, seven hundred six thousand, four hundred sixty-eight".