6660656616 has 64 divisors (see below), whose sum is σ = 16739611200. Its totient is φ = 2208526848.

The previous prime is 6660656609. The next prime is 6660656711. The reversal of 6660656616 is 6166560666.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4583346 + ... + 4584798.

It is an arithmetic number, because the mean of its divisors is an integer number (261556425).

Almost surely, 2^6660656616 is an apocalyptic number.

It is an amenable number.

6660656616 is an abundant number, since it is smaller than the sum of its proper divisors (10078954584).

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

6660656616 is a wasteful number, since it uses less digits than its factorization.

6660656616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338 (or 2334 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 48.

The square root of 6660656616 is about 81612.8459006301. The cubic root of 6660656616 is about 1881.5063203012.

The spelling of 6660656616 in words is "six billion, six hundred sixty million, six hundred fifty-six thousand, six hundred sixteen".