6666912 has 72 divisors (see below), whose sum is σ = 21674016. Its totient is φ = 1904256.

The previous prime is 6666883. The next prime is 6666931. The reversal of 6666912 is 2196666.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 363 + ... + 3669.

It is an arithmetic number, because the mean of its divisors is an integer number (301028).

Almost surely, 2^6666912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10837008).

6666912 is an abundant number, since it is smaller than the sum of its proper divisors (15007104).

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

6666912 is a wasteful number, since it uses less digits than its factorization.

6666912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330 (or 3319 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 6666912 is about 2582.0364056303. The cubic root of 6666912 is about 188.2095144229.

The spelling of 6666912 in words is "six million, six hundred sixty-six thousand, nine hundred twelve".