6650616666 has 16 divisors (see below), whose sum is σ = 13302561888. Its totient is φ = 2216650800.

The previous prime is 6650616641. The next prime is 6650616671. The reversal of 6650616666 is 6666160566.

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, 16996 + ... + 116576.

It is an arithmetic number, because the mean of its divisors is an integer number (831410118).

Almost surely, 2^6650616666 is an apocalyptic number.

6650616666 is an abundant number, since it is smaller than the sum of its proper divisors (6651945222).

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

6650616666 is a wasteful number, since it uses less digits than its factorization.

6650616666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110717.

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

The square root of 6650616666 is about 81551.3130856886. The cubic root of 6650616666 is about 1880.5604811830.

The spelling of 6650616666 in words is "six billion, six hundred fifty million, six hundred sixteen thousand, six hundred sixty-six".