8190661 has 2 divisors, whose sum is σ = 8190662. Its totient is φ = 8190660.

The previous prime is 8190647. The next prime is 8190667. The reversal of 8190661 is 1660918.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5317636 + 2873025 = 2306^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 8190661 - 2¹¹ = 8188613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8190667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4095330 + 4095331.

It is an arithmetic number, because the mean of its divisors is an integer number (4095331).

Almost surely, 2^8190661 is an apocalyptic number.

It is an amenable number.

8190661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8190661 is an equidigital number, since it uses as much as digits as its factorization.

8190661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 8190661 is about 2861.9330879669. The cubic root of 8190661 is about 201.5763840886.

The spelling of 8190661 in words is "eight million, one hundred ninety thousand, six hundred sixty-one".