9661120669 has 2 divisors, whose sum is σ = 9661120670. Its totient is φ = 9661120668.

The previous prime is 9661120663. The next prime is 9661120691. The reversal of 9661120669 is 9660211669.

9661120669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8685308025 + 975812644 = 93195^2 + 31238^2 .

It is a cyclic number.

It is not a de Polignac number, because 9661120669 - 2¹⁵ = 9661087901 is a prime.

It is a super-2 number, since 2×9661120669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9661120663) 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 as a sum of consecutive naturals, namely, 4830560334 + 4830560335.

It is an arithmetic number, because the mean of its divisors is an integer number (4830560335).

Almost surely, 2^9661120669 is an apocalyptic number.

It is an amenable number.

9661120669 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661120669 is an equidigital number, since it uses as much as digits as its factorization.

9661120669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 9661120669 is about 98290.9999389568. Note that the first 4 decimals coincide. The cubic root of 9661120669 is about 2129.8180444391.

The spelling of 9661120669 in words is "nine billion, six hundred sixty-one million, one hundred twenty thousand, six hundred sixty-nine".