8886387661 has 2 divisors, whose sum is σ = 8886387662. Its totient is φ = 8886387660.

The previous prime is 8886387641. The next prime is 8886387667. The reversal of 8886387661 is 1667836888.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7581010761 + 1305376900 = 87069^2 + 36130^2 .

It is a cyclic number.

It is not a de Polignac number, because 8886387661 - 2¹⁹ = 8885863373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8886387661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8886387667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4443193830 + 4443193831.

It is an arithmetic number, because the mean of its divisors is an integer number (4443193831).

Almost surely, 2^8886387661 is an apocalyptic number.

It is an amenable number.

8886387661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8886387661 is an equidigital number, since it uses as much as digits as its factorization.

8886387661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18579456, while the sum is 61.

The square root of 8886387661 is about 94267.6384609268. The cubic root of 8886387661 is about 2071.2940216604.

The spelling of 8886387661 in words is "eight billion, eight hundred eighty-six million, three hundred eighty-seven thousand, six hundred sixty-one".