8663351761 has 2 divisors, whose sum is σ = 8663351762. Its totient is φ = 8663351760.

The previous prime is 8663351747. The next prime is 8663351773. The reversal of 8663351761 is 1671533668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8601635025 + 61716736 = 92745^2 + 7856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8663351761 is a prime.

It is a super-2 number, since 2×8663351761² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8663351161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4331675880 + 4331675881.

It is an arithmetic number, because the mean of its divisors is an integer number (4331675881).

Almost surely, 2^8663351761 is an apocalyptic number.

It is an amenable number.

8663351761 is a deficient number, since it is larger than the sum of its proper divisors (1).

8663351761 is an equidigital number, since it uses as much as digits as its factorization.

8663351761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 8663351761 is about 93077.1280229466. The cubic root of 8663351761 is about 2053.8181280992.

The spelling of 8663351761 in words is "eight billion, six hundred sixty-three million, three hundred fifty-one thousand, seven hundred sixty-one".