6666444 has 36 divisors (see below), whose sum is σ = 16936920. Its totient is φ = 2210880.

The previous prime is 6666437. The next prime is 6666449. The reversal of 6666444 is 4446666.

It is a happy number.

6666444 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct 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 a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6666399 and 6666408.

It is not an unprimeable number, because it can be changed into a prime (6666449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9787 + ... + 10445.

It is an arithmetic number, because the mean of its divisors is an integer number (470470).

Almost surely, 2^6666444 is an apocalyptic number.

It is an amenable number.

6666444 is an abundant number, since it is smaller than the sum of its proper divisors (10270476).

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

6666444 is a wasteful number, since it uses less digits than its factorization.

6666444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 945 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 6666444 is about 2581.9457778970. The cubic root of 6666444 is about 188.2051103793.

The spelling of 6666444 in words is "six million, six hundred sixty-six thousand, four hundred forty-four".