9866877056 has 16 divisors (see below), whose sum is σ = 19656669390. Its totient is φ = 4933438464.

The previous prime is 9866877047. The next prime is 9866877091. The reversal of 9866877056 is 6507786689.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8503790656 + 1363086400 = 92216^2 + 36920^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 9866877056.

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 as a sum of consecutive naturals, namely, 38542361 + ... + 38542616.

Almost surely, 2^9866877056 is an apocalyptic number.

It is an amenable number.

9866877056 is a deficient number, since it is larger than the sum of its proper divisors (9789792334).

9866877056 is an equidigital number, since it uses as much as digits as its factorization.

9866877056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77084991 (or 77084979 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 62.

The square root of 9866877056 is about 99332.1551965928. The cubic root of 9866877056 is about 2144.8317946500.

The spelling of 9866877056 in words is "nine billion, eight hundred sixty-six million, eight hundred seventy-seven thousand, fifty-six".