1664012041 has 2 divisors, whose sum is σ = 1664012042. Its totient is φ = 1664012040.

The previous prime is 1664012033. The next prime is 1664012081. The reversal of 1664012041 is 1402104661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1648684816 + 15327225 = 40604^2 + 3915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664012041 - 2³ = 1664012033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1664011997 and 1664012015.

It is not a weakly prime, because it can be changed into another prime (1664012081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832006020 + 832006021.

It is an arithmetic number, because the mean of its divisors is an integer number (832006021).

Almost surely, 2^1664012041 is an apocalyptic number.

It is an amenable number.

1664012041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664012041 is an equidigital number, since it uses as much as digits as its factorization.

1664012041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1664012041 is about 40792.3036981242. The cubic root of 1664012041 is about 1185.0012856425.

The spelling of 1664012041 in words is "one billion, six hundred sixty-four million, twelve thousand, forty-one".