6566004 has 18 divisors (see below), whose sum is σ = 16597490. Its totient is φ = 2188656.

The previous prime is 6566003. The next prime is 6566033. The reversal of 6566004 is 4006656.

6566004 is a `hidden beast` number, since 6 + 56 + 600 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6502500 + 63504 = 2550^2 + 252^2 .

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

It is a super-2 number, since 2×6566004² = 86224817056032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91159 + ... + 91230.

Almost surely, 2^6566004 is an apocalyptic number.

It is an amenable number.

6566004 is an abundant number, since it is smaller than the sum of its proper divisors (10031486).

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

6566004 is a wasteful number, since it uses less digits than its factorization.

6566004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182399 (or 182394 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 6566004 is about 2562.4215109931. The cubic root of 6566004 is about 187.2551256675.

The spelling of 6566004 in words is "six million, five hundred sixty-six thousand, four".