6564478 has 8 divisors (see below), whose sum is σ = 9860760. Its totient is φ = 3277560.

The previous prime is 6564461. The next prime is 6564511. The reversal of 6564478 is 8744656.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6564478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193 + ... + 3628.

It is an arithmetic number, because the mean of its divisors is an integer number (1232595).

Almost surely, 2^6564478 is an apocalyptic number.

6564478 is a deficient number, since it is larger than the sum of its proper divisors (3296282).

6564478 is a wasteful number, since it uses less digits than its factorization.

6564478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682.

The product of its digits is 161280, while the sum is 40.

The square root of 6564478 is about 2562.1237284721. The cubic root of 6564478 is about 187.2406179364.

The spelling of 6564478 in words is "six million, five hundred sixty-four thousand, four hundred seventy-eight".