6616610666 has 8 divisors (see below), whose sum is σ = 9927891360. Its totient is φ = 3307313548.

The previous prime is 6616610659. The next prime is 6616610699. The reversal of 6616610666 is 6660166166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487526 + ... + 500913.

It is an arithmetic number, because the mean of its divisors is an integer number (1240986420).

Almost surely, 2^6616610666 is an apocalyptic number.

6616610666 is a deficient number, since it is larger than the sum of its proper divisors (3311280694).

6616610666 is a wasteful number, since it uses less digits than its factorization.

6616610666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991788.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 6616610666 is about 81342.5513860980. The cubic root of 6616610666 is about 1877.3497690140.

The spelling of 6616610666 in words is "six billion, six hundred sixteen million, six hundred ten thousand, six hundred sixty-six".