7522866 has 36 divisors (see below), whose sum is σ = 17656938. Its totient is φ = 2313792.

The previous prime is 7522847. The next prime is 7522901. The reversal of 7522866 is 6682257.

It can be written as a sum of positive squares in 3 ways, for example, as 4730625 + 2792241 = 2175^2 + 1671^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7522866.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 1806 + ... + 4278.

Almost surely, 2^7522866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7522866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8828469).

7522866 is an abundant number, since it is smaller than the sum of its proper divisors (10134072).

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

7522866 is a wasteful number, since it uses less digits than its factorization.

7522866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507 (or 2491 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 7522866 is about 2742.7843517127. The cubic root of 7522866 is about 195.9421077112.

The spelling of 7522866 in words is "seven million, five hundred twenty-two thousand, eight hundred sixty-six".