9446872661 has 4 divisors (see below), whose sum is σ = 9447187500. Its totient is φ = 9446557824.

The previous prime is 9446872657. The next prime is 9446872679. The reversal of 9446872661 is 1662786449.

9446872661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1662786449 = 23 ⋅72295063.

It can be written as a sum of positive squares in 2 ways, for example, as 5052508561 + 4394364100 = 71081^2 + 66290^2 .

It is a cyclic number.

It is not a de Polignac number, because 9446872661 - 2² = 9446872657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9446872861) 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 3 ways as a sum of consecutive naturals, for example, 107036 + ... + 174213.

It is an arithmetic number, because the mean of its divisors is an integer number (2361796875).

Almost surely, 2^9446872661 is an apocalyptic number.

It is an amenable number.

9446872661 is a deficient number, since it is larger than the sum of its proper divisors (314839).

9446872661 is a wasteful number, since it uses less digits than its factorization.

9446872661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314838.

The product of its digits is 3483648, while the sum is 53.

The square root of 9446872661 is about 97195.0238489605. The cubic root of 9446872661 is about 2113.9563738649.

The spelling of 9446872661 in words is "nine billion, four hundred forty-six million, eight hundred seventy-two thousand, six hundred sixty-one".