9864661041 has 9 divisors (see below), whose sum is σ = 14249385241. Its totient is φ = 6576242052.

The previous prime is 9864661021. The next prime is 9864661087. The reversal of 9864661041 is 1401664689.

The square root of 9864661041 is 99321.

It is a perfect power (a square), and thus also a powerful number.

9864661041 is a `hidden beast` number, since 9 + 86 + 466 + 104 + 1 = 666.

9864661041 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 9864661041 - 2⁷ = 9864660913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9864661021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 281410 + ... + 314516.

Almost surely, 2^9864661041 is an apocalyptic number.

9864661041 is the 99321-st square number.

9864661041 is the 49661-st centered octagonal number.

It is an amenable number.

9864661041 is a deficient number, since it is larger than the sum of its proper divisors (4384724200).

9864661041 is an frugal number, since it uses more digits than its factorization.

9864661041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66220 (or 33110 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The cubic root of 9864661041 is about 2144.6712124221.

The spelling of 9864661041 in words is "nine billion, eight hundred sixty-four million, six hundred sixty-one thousand, forty-one".