6606666 has 48 divisors (see below), whose sum is σ = 15900768. Its totient is φ = 1965600.

The previous prime is 6606653. The next prime is 6606673. The reversal of 6606666 is 6666066.

6606666 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

6606666 is a modest number, since divided by 6666 gives 660 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 6606666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11805 + ... + 12351.

It is an arithmetic number, because the mean of its divisors is an integer number (331266).

Almost surely, 2^6606666 is an apocalyptic number.

6606666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6606666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7950384).

6606666 is an abundant number, since it is smaller than the sum of its proper divisors (9294102).

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

6606666 is a wasteful number, since it uses less digits than its factorization.

6606666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 6606666 is about 2570.3435568033. The cubic root of 6606666 is about 187.6408754620.

The spelling of 6606666 in words is "six million, six hundred six thousand, six hundred sixty-six".