9287961166681 has 8 divisors (see below), whose sum is σ = 9608551659720. Its totient is φ = 8967391738368.

The previous prime is 9287961166669. The next prime is 9287961166691. The reversal of 9287961166681 is 1866611697829.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4964389504281 + 4323571662400 = 2228091^2 + 2079320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9287961166681 - 2³¹ = 9285813683033 is a prime.

It is a super-2 number, since 2×9287961166681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9287961166681.

It is not an unprimeable number, because it can be changed into a prime (9287961166661) 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 7 ways as a sum of consecutive naturals, for example, 4366506 + ... + 6135331.

It is an arithmetic number, because the mean of its divisors is an integer number (1201068957465).

Almost surely, 2^{9287961166681} is an apocalyptic number.

It is an amenable number.

9287961166681 is a deficient number, since it is larger than the sum of its proper divisors (320590493039).

9287961166681 is a wasteful number, since it uses less digits than its factorization.

9287961166681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10532363.

The product of its digits is 94058496, while the sum is 70.

The spelling of 9287961166681 in words is "nine trillion, two hundred eighty-seven billion, nine hundred sixty-one million, one hundred sixty-six thousand, six hundred eighty-one".