17666041 has 2 divisors, whose sum is σ = 17666042. Its totient is φ = 17666040.

The previous prime is 17666003. The next prime is 17666053. The reversal of 17666041 is 14066671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15093225 + 2572816 = 3885^2 + 1604^2 .

It is an emirp because it is prime and its reverse (14066671) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17666041 - 2¹¹ = 17663993 is a prime.

It is a super-2 number, since 2×17666041² = 624178009227362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 17665994 and 17666012.

It is not a weakly prime, because it can be changed into another prime (17666071) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8833020 + 8833021.

It is an arithmetic number, because the mean of its divisors is an integer number (8833021).

Almost surely, 2^17666041 is an apocalyptic number.

It is an amenable number.

17666041 is a deficient number, since it is larger than the sum of its proper divisors (1).

17666041 is an equidigital number, since it uses as much as digits as its factorization.

17666041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 17666041 is about 4203.0989757559. The cubic root of 17666041 is about 260.4432331240.

The spelling of 17666041 in words is "seventeen million, six hundred sixty-six thousand, forty-one".