6525666 has 48 divisors (see below), whose sum is σ = 16421184. Its totient is φ = 1834272.

The previous prime is 6525661. The next prime is 6525677. The reversal of 6525666 is 6665256.

It is a self number, because there is not a number n which added to its sum of digits gives 6525666.

It is not an unprimeable number, because it can be changed into a prime (6525661) 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 23 ways as a sum of consecutive naturals, for example, 8056 + ... + 8828.

It is an arithmetic number, because the mean of its divisors is an integer number (342108).

Almost surely, 2^6525666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6525666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8210592).

6525666 is an abundant number, since it is smaller than the sum of its proper divisors (9895518).

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

6525666 is a wasteful number, since it uses less digits than its factorization.

6525666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 852 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 6525666 is about 2554.5383144514. The cubic root of 6525666 is about 186.8708727552.

The spelling of 6525666 in words is "six million, five hundred twenty-five thousand, six hundred sixty-six".