9847206661 has 2 divisors, whose sum is σ = 9847206662. Its totient is φ = 9847206660.

The previous prime is 9847206623. The next prime is 9847206767. The reversal of 9847206661 is 1666027489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7174937025 + 2672269636 = 84705^2 + 51694^2 .

It is a cyclic number.

It is not a de Polignac number, because 9847206661 - 2²³ = 9838818053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9847206601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4923603330 + 4923603331.

It is an arithmetic number, because the mean of its divisors is an integer number (4923603331).

Almost surely, 2^9847206661 is an apocalyptic number.

It is an amenable number.

9847206661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9847206661 is an equidigital number, since it uses as much as digits as its factorization.

9847206661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 9847206661 is about 99233.0925699688. The cubic root of 9847206661 is about 2143.4055495266.

The spelling of 9847206661 in words is "nine billion, eight hundred forty-seven million, two hundred six thousand, six hundred sixty-one".