6409566 has 24 divisors (see below), whose sum is σ = 14034384. Its totient is φ = 2113920.

The previous prime is 6409549. The next prime is 6409577. The reversal of 6409566 is 6659046.

It is a happy number.

6409566 is a `hidden beast` number, since 640 + 9 + 5 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6409566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90 + ... + 3581.

It is an arithmetic number, because the mean of its divisors is an integer number (584766).

Almost surely, 2^6409566 is an apocalyptic number.

6409566 is an abundant number, since it is smaller than the sum of its proper divisors (7624818).

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

6409566 is a wasteful number, since it uses less digits than its factorization.

6409566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776 (or 3773 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 6409566 is about 2531.7120689368. The cubic root of 6409566 is about 185.7560102925.

Adding to 6409566 its product of nonzero digits (38880), we get a palindrome (6448446).

The spelling of 6409566 in words is "six million, four hundred nine thousand, five hundred sixty-six".