6641406 has 32 divisors (see below), whose sum is σ = 15271200. Its totient is φ = 2136960.

The previous prime is 6641399. The next prime is 6641419. The reversal of 6641406 is 6041466.

It is a hoax number, since the sum of its digits (27) 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 (27).

It is a self number, because there is not a number n which added to its sum of digits gives 6641406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555 + ... + 3686.

It is an arithmetic number, because the mean of its divisors is an integer number (477225).

Almost surely, 2^6641406 is an apocalyptic number.

6641406 is an abundant number, since it is smaller than the sum of its proper divisors (8629794).

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

6641406 is a wasteful number, since it uses less digits than its factorization.

6641406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281 (or 4275 counting only the distinct ones).

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

The square root of 6641406 is about 2577.0925478143. The cubic root of 6641406 is about 187.9691929300.

The spelling of 6641406 in words is "six million, six hundred forty-one thousand, four hundred six".