6404566 has 8 divisors (see below), whose sum is σ = 10979280. Its totient is φ = 2744808.

The previous prime is 6404551. The next prime is 6404581. The reversal of 6404566 is 6654046.

It is an interprime number because it is at equal distance from previous prime (6404551) and next prime (6404581).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

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 3 ways as a sum of consecutive naturals, for example, 228721 + ... + 228748.

It is an arithmetic number, because the mean of its divisors is an integer number (1372410).

Almost surely, 2^6404566 is an apocalyptic number.

6404566 is a deficient number, since it is larger than the sum of its proper divisors (4574714).

6404566 is a wasteful number, since it uses less digits than its factorization.

6404566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457478.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 6404566 is about 2530.7244022216. The cubic root of 6404566 is about 185.7076959623.

The spelling of 6404566 in words is "six million, four hundred four thousand, five hundred sixty-six".