1665000041 has 2 divisors, whose sum is σ = 1665000042. Its totient is φ = 1665000040.

The previous prime is 1665000017. The next prime is 1665000083. The reversal of 1665000041 is 1400005661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1156272016 + 508728025 = 34004^2 + 22555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1665000041 - 2¹⁴ = 1664983657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1664999980 and 1665000016.

It is not a weakly prime, because it can be changed into another prime (1665000641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832500020 + 832500021.

It is an arithmetic number, because the mean of its divisors is an integer number (832500021).

Almost surely, 2^1665000041 is an apocalyptic number.

It is an amenable number.

1665000041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665000041 is an equidigital number, since it uses as much as digits as its factorization.

1665000041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1665000041 is about 40804.4120286030. The cubic root of 1665000041 is about 1185.2357690482.

The spelling of 1665000041 in words is "one billion, six hundred sixty-five million, forty-one", and thus it is an aban number.