6659945066 has 16 divisors (see below), whose sum is σ = 10125083808. Its totient is φ = 3285034800.

The previous prime is 6659945057. The next prime is 6659945093. The reversal of 6659945066 is 6605499566.

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, 85676 + ... + 143736.

It is an arithmetic number, because the mean of its divisors is an integer number (632817738).

Almost surely, 2^6659945066 is an apocalyptic number.

6659945066 is a deficient number, since it is larger than the sum of its proper divisors (3465138742).

6659945066 is a wasteful number, since it uses less digits than its factorization.

6659945066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58837.

The product of its (nonzero) digits is 10497600, while the sum is 56.

The square root of 6659945066 is about 81608.4864827182. The cubic root of 6659945066 is about 1881.4393182234.

The spelling of 6659945066 in words is "six billion, six hundred fifty-nine million, nine hundred forty-five thousand, sixty-six".