8955963661 has 2 divisors, whose sum is σ = 8955963662. Its totient is φ = 8955963660.

The previous prime is 8955963649. The next prime is 8955963689. The reversal of 8955963661 is 1663695598.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6535914025 + 2420049636 = 80845^2 + 49194^2 .

It is a cyclic number.

It is not a de Polignac number, because 8955963661 - 2¹¹ = 8955961613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8955963596 and 8955963605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8955963641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4477981830 + 4477981831.

It is an arithmetic number, because the mean of its divisors is an integer number (4477981831).

Almost surely, 2^8955963661 is an apocalyptic number.

It is an amenable number.

8955963661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8955963661 is an equidigital number, since it uses as much as digits as its factorization.

8955963661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10497600, while the sum is 58.

The square root of 8955963661 is about 94635.9533211348. The cubic root of 8955963661 is about 2076.6857089782.

The spelling of 8955963661 in words is "eight billion, nine hundred fifty-five million, nine hundred sixty-three thousand, six hundred sixty-one".