6555564 has 18 divisors (see below), whose sum is σ = 16571100. Its totient is φ = 2185176.

The previous prime is 6555547. The next prime is 6555581. The reversal of 6555564 is 4655556.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6555547) and next prime (6555581).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 182099 = 6555564 / (6 + 5 + 5 + 5 + 5 + 6 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91014 + ... + 91085.

Almost surely, 2^6555564 is an apocalyptic number.

It is an amenable number.

6555564 is an abundant number, since it is smaller than the sum of its proper divisors (10015536).

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

6555564 is a wasteful number, since it uses less digits than its factorization.

6555564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182109 (or 182104 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 6555564 is about 2560.3835650152. The cubic root of 6555564 is about 187.1558272940.

The spelling of 6555564 in words is "six million, five hundred fifty-five thousand, five hundred sixty-four".