8661061 has 2 divisors, whose sum is σ = 8661062. Its totient is φ = 8661060.

The previous prime is 8661049. The next prime is 8661089. The reversal of 8661061 is 1601668.

It is an a-pointer prime, because the next prime (8661089) can be obtained adding 8661061 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8444836 + 216225 = 2906^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 8661061 - 2⁷ = 8660933 is a prime.

It is a Chen prime.

8661061 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8661001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4330530 + 4330531.

It is an arithmetic number, because the mean of its divisors is an integer number (4330531).

Almost surely, 2^8661061 is an apocalyptic number.

It is an amenable number.

8661061 is a deficient number, since it is larger than the sum of its proper divisors (1).

8661061 is an equidigital number, since it uses as much as digits as its factorization.

8661061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 8661061 is about 2942.9680596296. The cubic root of 8661061 is about 205.3637088807.

The spelling of 8661061 in words is "eight million, six hundred sixty-one thousand, sixty-one".