6564406 has 4 divisors (see below), whose sum is σ = 9846612. Its totient is φ = 3282202.

The previous prime is 6564401. The next prime is 6564409. The reversal of 6564406 is 6044656.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×6564406² = 86182852265672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6564401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1641100 + ... + 1641103.

It is an arithmetic number, because the mean of its divisors is an integer number (2461653).

Almost surely, 2^6564406 is an apocalyptic number.

6564406 is a deficient number, since it is larger than the sum of its proper divisors (3282206).

6564406 is a wasteful number, since it uses less digits than its factorization.

6564406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282205.

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

The square root of 6564406 is about 2562.1096775899. The cubic root of 6564406 is about 187.2399333746.

The spelling of 6564406 in words is "six million, five hundred sixty-four thousand, four hundred six".