6644106 has 96 divisors (see below), whose sum is σ = 17948160. Its totient is φ = 1837080.

The previous prime is 6644101. The next prime is 6644111. The reversal of 6644106 is 6014466.

6644106 is a `hidden beast` number, since 6 + 644 + 10 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (6644101) and next prime (6644111).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6644106.

It is not an unprimeable number, because it can be changed into a prime (6644101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214311 + ... + 214341.

It is an arithmetic number, because the mean of its divisors is an integer number (186960).

Almost surely, 2^6644106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6644106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8974080).

6644106 is an abundant number, since it is smaller than the sum of its proper divisors (11304054).

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

6644106 is an equidigital number, since it uses as much as digits as its factorization.

6644106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 6644106 is about 2577.6163407303. The cubic root of 6644106 is about 187.9946618373.

The spelling of 6644106 in words is "six million, six hundred forty-four thousand, one hundred six".