8528782661 has 12 divisors (see below), whose sum is σ = 9971609868. Its totient is φ = 7273268352.

The previous prime is 8528782597. The next prime is 8528782699. The reversal of 8528782661 is 1662878258.

It can be written as a sum of positive squares in 2 ways, for example, as 4343469025 + 4185313636 = 65905^2 + 64694^2 .

It is not a de Polignac number, because 8528782661 - 2⁶ = 8528782597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8528782261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432116 + ... + 451421.

It is an arithmetic number, because the mean of its divisors is an integer number (830967489).

Almost surely, 2^8528782661 is an apocalyptic number.

It is an amenable number.

8528782661 is a deficient number, since it is larger than the sum of its proper divisors (1442827207).

8528782661 is a wasteful number, since it uses less digits than its factorization.

8528782661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883748 (or 883741 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 53.

The square root of 8528782661 is about 92351.4085490849. The cubic root of 8528782661 is about 2043.1285027154.

The spelling of 8528782661 in words is "eight billion, five hundred twenty-eight million, seven hundred eighty-two thousand, six hundred sixty-one".