9661748611 has 2 divisors, whose sum is σ = 9661748612. Its totient is φ = 9661748610.

The previous prime is 9661748599. The next prime is 9661748623. The reversal of 9661748611 is 1168471669.

It is a balanced prime because it is at equal distance from previous prime (9661748599) and next prime (9661748623).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9661748611 is a prime.

It is not a weakly prime, because it can be changed into another prime (9661748651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830874305 + 4830874306.

It is an arithmetic number, because the mean of its divisors is an integer number (4830874306).

Almost surely, 2^9661748611 is an apocalyptic number.

9661748611 is the 43959-th centered decagonal number.

9661748611 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661748611 is an equidigital number, since it uses as much as digits as its factorization.

9661748611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 9661748611 is about 98294.1941876528. The cubic root of 9661748611 is about 2129.8641872305.

The spelling of 9661748611 in words is "nine billion, six hundred sixty-one million, seven hundred forty-eight thousand, six hundred eleven".