16661480041 has 2 divisors, whose sum is σ = 16661480042. Its totient is φ = 16661480040.

The previous prime is 16661480021. The next prime is 16661480051. The reversal of 16661480041 is 14008416661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15138841600 + 1522638441 = 123040^2 + 39021^2 .

It is a cyclic number.

It is not a de Polignac number, because 16661480041 - 2²⁹ = 16124609129 is a prime.

It is not a weakly prime, because it can be changed into another prime (16661480021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330740020 + 8330740021.

It is an arithmetic number, because the mean of its divisors is an integer number (8330740021).

Almost surely, 2^16661480041 is an apocalyptic number.

It is an amenable number.

16661480041 is a deficient number, since it is larger than the sum of its proper divisors (1).

16661480041 is an equidigital number, since it uses as much as digits as its factorization.

16661480041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 16661480041 in words is "sixteen billion, six hundred sixty-one million, four hundred eighty thousand, forty-one".