6566660 has 12 divisors (see below), whose sum is σ = 13790028. Its totient is φ = 2626656.

The previous prime is 6566657. The next prime is 6566663. The reversal of 6566660 is 666656.

It is an interprime number because it is at equal distance from previous prime (6566657) and next prime (6566663).

It can be written as a sum of positive squares in 2 ways, for example, as 5234944 + 1331716 = 2288^2 + 1154^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6566660.

It is not an unprimeable number, because it can be changed into a prime (6566663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164147 + ... + 164186.

It is an arithmetic number, because the mean of its divisors is an integer number (1149169).

Almost surely, 2^6566660 is an apocalyptic number.

It is an amenable number.

6566660 is an abundant number, since it is smaller than the sum of its proper divisors (7223368).

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

6566660 is a wasteful number, since it uses less digits than its factorization.

6566660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328342 (or 328340 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 6566660 is about 2562.5495117168. The cubic root of 6566660 is about 187.2613615898.

The spelling of 6566660 in words is "six million, five hundred sixty-six thousand, six hundred sixty".