8621166877 has 2 divisors, whose sum is σ = 8621166878. Its totient is φ = 8621166876.

The previous prime is 8621166863. The next prime is 8621166937. The reversal of 8621166877 is 7786611268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6135745561 + 2485421316 = 78331^2 + 49854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8621166877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8621166677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4310583438 + 4310583439.

It is an arithmetic number, because the mean of its divisors is an integer number (4310583439).

Almost surely, 2^8621166877 is an apocalyptic number.

It is an amenable number.

8621166877 is a deficient number, since it is larger than the sum of its proper divisors (1).

8621166877 is an equidigital number, since it uses as much as digits as its factorization.

8621166877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 52.

The square root of 8621166877 is about 92850.2389711518. The cubic root of 8621166877 is about 2050.4791168066.

The spelling of 8621166877 in words is "eight billion, six hundred twenty-one million, one hundred sixty-six thousand, eight hundred seventy-seven".