66660668120 has 16 divisors (see below), whose sum is σ = 149986503360. Its totient is φ = 26664267232.

The previous prime is 66660668099. The next prime is 66660668131. The reversal of 66660668120 is 2186606666.

It is a congruent number.

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, 833258312 + ... + 833258391.

It is an arithmetic number, because the mean of its divisors is an integer number (9374156460).

Almost surely, 2^66660668120 is an apocalyptic number.

It is an amenable number.

66660668120 is an abundant number, since it is smaller than the sum of its proper divisors (83325835240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66660668120 is a wasteful number, since it uses less digits than its factorization.

66660668120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666516714 (or 1666516710 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 66660668120 in words is "sixty-six billion, six hundred sixty million, six hundred sixty-eight thousand, one hundred twenty".