104566661 has 2 divisors, whose sum is σ = 104566662. Its totient is φ = 104566660.

The previous prime is 104566639. The next prime is 104566673. The reversal of 104566661 is 166665401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99700225 + 4866436 = 9985^2 + 2206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104566661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104566621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52283330 + 52283331.

It is an arithmetic number, because the mean of its divisors is an integer number (52283331).

Almost surely, 2^104566661 is an apocalyptic number.

It is an amenable number.

104566661 is a deficient number, since it is larger than the sum of its proper divisors (1).

104566661 is an equidigital number, since it uses as much as digits as its factorization.

104566661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 104566661 is about 10225.7841264130. The cubic root of 104566661 is about 471.1194997324.

The spelling of 104566661 in words is "one hundred four million, five hundred sixty-six thousand, six hundred sixty-one".