9549466681 has 2 divisors, whose sum is σ = 9549466682. Its totient is φ = 9549466680.

The previous prime is 9549466649. The next prime is 9549466687. The reversal of 9549466681 is 1866649459.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9548221225 + 1245456 = 97715^2 + 1116^2 .

It is a cyclic number.

It is not a de Polignac number, because 9549466681 - 2⁵ = 9549466649 is a prime.

It is a super-2 number, since 2×9549466681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9549466687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4774733340 + 4774733341.

It is an arithmetic number, because the mean of its divisors is an integer number (4774733341).

Almost surely, 2^9549466681 is an apocalyptic number.

It is an amenable number.

9549466681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9549466681 is an equidigital number, since it uses as much as digits as its factorization.

9549466681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11197440, while the sum is 58.

The square root of 9549466681 is about 97721.3726929785. The cubic root of 9549466681 is about 2121.5814325336.

The spelling of 9549466681 in words is "nine billion, five hundred forty-nine million, four hundred sixty-six thousand, six hundred eighty-one".