6566620 has 12 divisors (see below), whose sum is σ = 13789944. Its totient is φ = 2626640.

The previous prime is 6566617. The next prime is 6566621. The reversal of 6566620 is 266656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164146 + ... + 164185.

It is an arithmetic number, because the mean of its divisors is an integer number (1149162).

Almost surely, 2^6566620 is an apocalyptic number.

It is an amenable number.

6566620 is an abundant number, since it is smaller than the sum of its proper divisors (7223324).

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

6566620 is a wasteful number, since it uses less digits than its factorization.

6566620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328340 (or 328338 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 6566620 is about 2562.5417069777. The cubic root of 6566620 is about 187.2609813625.

The spelling of 6566620 in words is "six million, five hundred sixty-six thousand, six hundred twenty".