6660606 has 16 divisors (see below), whose sum is σ = 13351824. Its totient is φ = 2215104.

The previous prime is 6660601. The next prime is 6660613. The reversal of 6660606 is 6060666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2346 + ... + 4338.

It is an arithmetic number, because the mean of its divisors is an integer number (834489).

Almost surely, 2^6660606 is an apocalyptic number.

6660606 is an abundant number, since it is smaller than the sum of its proper divisors (6691218).

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

6660606 is a wasteful number, since it uses less digits than its factorization.

6660606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 6660606 is about 2580.8149875572. The cubic root of 6660606 is about 188.1501554276.

The spelling of 6660606 in words is "six million, six hundred sixty thousand, six hundred six".