8866621 has 2 divisors, whose sum is σ = 8866622. Its totient is φ = 8866620.

The previous prime is 8866609. The next prime is 8866633. The reversal of 8866621 is 1266688.

It is a balanced prime because it is at equal distance from previous prime (8866609) and next prime (8866633).

It can be written as a sum of positive squares in only one way, i.e., 7452900 + 1413721 = 2730^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 8866621 - 2¹⁷ = 8735549 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8866601) 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, 4433310 + 4433311.

It is an arithmetic number, because the mean of its divisors is an integer number (4433311).

Almost surely, 2^8866621 is an apocalyptic number.

It is an amenable number.

8866621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8866621 is an equidigital number, since it uses as much as digits as its factorization.

8866621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 8866621 is about 2977.6871897498. The cubic root of 8866621 is about 206.9757103132.

The spelling of 8866621 in words is "eight million, eight hundred sixty-six thousand, six hundred twenty-one".