8577118661 has 2 divisors, whose sum is σ = 8577118662. Its totient is φ = 8577118660.

The previous prime is 8577118651. The next prime is 8577118673. The reversal of 8577118661 is 1668117758.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8478910561 + 98208100 = 92081^2 + 9910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8577118661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8577118621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4288559330 + 4288559331.

It is an arithmetic number, because the mean of its divisors is an integer number (4288559331).

Almost surely, 2^8577118661 is an apocalyptic number.

It is an amenable number.

8577118661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8577118661 is an equidigital number, since it uses as much as digits as its factorization.

8577118661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 50.

The square root of 8577118661 is about 92612.7348748540. The cubic root of 8577118661 is about 2046.9809743601.

The spelling of 8577118661 in words is "eight billion, five hundred seventy-seven million, one hundred eighteen thousand, six hundred sixty-one".