6564420 has 36 divisors (see below), whose sum is σ = 19912620. Its totient is φ = 1750464.

The previous prime is 6564419. The next prime is 6564449. The reversal of 6564420 is 244656.

It is a happy number.

6564420 is a `hidden beast` number, since 656 + 4 + 4 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2304324 + 4260096 = 1518^2 + 2064^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18055 + ... + 18414.

Almost surely, 2^6564420 is an apocalyptic number.

6564420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6564420 is an abundant number, since it is smaller than the sum of its proper divisors (13348200).

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

6564420 is a wasteful number, since it uses less digits than its factorization.

6564420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36484 (or 36479 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 6564420 is about 2562.1124097120. The cubic root of 6564420 is about 187.2400664842.

The spelling of 6564420 in words is "six million, five hundred sixty-four thousand, four hundred twenty".