9661069091 has 2 divisors, whose sum is σ = 9661069092. Its totient is φ = 9661069090.

The previous prime is 9661069081. The next prime is 9661069097. The reversal of 9661069091 is 1909601669.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9661069091 is a prime.

It is not a weakly prime, because it can be changed into another prime (9661069097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830534545 + 4830534546.

It is an arithmetic number, because the mean of its divisors is an integer number (4830534546).

Almost surely, 2^9661069091 is an apocalyptic number.

9661069091 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661069091 is an equidigital number, since it uses as much as digits as its factorization.

9661069091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 9661069091 is about 98290.7375646353. The cubic root of 9661069091 is about 2129.8142542663.

The spelling of 9661069091 in words is "nine billion, six hundred sixty-one million, sixty-nine thousand, ninety-one".