8118661 has 2 divisors, whose sum is σ = 8118662. Its totient is φ = 8118660.

The previous prime is 8118653. The next prime is 8118679. The reversal of 8118661 is 1668118.

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., 7873636 + 245025 = 2806^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 8118661 - 2³ = 8118653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8118601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4059330 + 4059331.

It is an arithmetic number, because the mean of its divisors is an integer number (4059331).

Almost surely, 2^8118661 is an apocalyptic number.

It is an amenable number.

8118661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8118661 is an equidigital number, since it uses as much as digits as its factorization.

8118661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 31.

The square root of 8118661 is about 2849.3264116278. The cubic root of 8118661 is about 200.9839925207.

The spelling of 8118661 in words is "eight million, one hundred eighteen thousand, six hundred sixty-one".