8529666856 has 8 divisors (see below), whose sum is σ = 15993125370. Its totient is φ = 4264833424.

The previous prime is 8529666851. The next prime is 8529666857. The reversal of 8529666856 is 6586669258.

It can be written as a sum of positive squares in only one way, i.e., 8127022500 + 402644356 = 90150^2 + 20066^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 8529666794 and 8529666803.

It is not an unprimeable number, because it can be changed into a prime (8529666851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533104171 + ... + 533104186.

Almost surely, 2^8529666856 is an apocalyptic number.

It is an amenable number.

8529666856 is a deficient number, since it is larger than the sum of its proper divisors (7463458514).

8529666856 is a wasteful number, since it uses less digits than its factorization.

8529666856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066208363 (or 1066208359 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 61.

The square root of 8529666856 is about 92356.1955474564. The cubic root of 8529666856 is about 2043.1991052720.

The spelling of 8529666856 in words is "eight billion, five hundred twenty-nine million, six hundred sixty-six thousand, eight hundred fifty-six".