1660542041 has 2 divisors, whose sum is σ = 1660542042. Its totient is φ = 1660542040.

The previous prime is 1660542011. The next prime is 1660542043. The reversal of 1660542041 is 1402450661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 983449600 + 677092441 = 31360^2 + 26021^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660542041 - 2⁶ = 1660541977 is a prime.

Together with 1660542043, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660541995 and 1660542013.

It is not a weakly prime, because it can be changed into another prime (1660542043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830271020 + 830271021.

It is an arithmetic number, because the mean of its divisors is an integer number (830271021).

Almost surely, 2^1660542041 is an apocalyptic number.

It is an amenable number.

1660542041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660542041 is an equidigital number, since it uses as much as digits as its factorization.

1660542041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1660542041 is about 40749.7489685519. The cubic root of 1660542041 is about 1184.1770095506.

The spelling of 1660542041 in words is "one billion, six hundred sixty million, five hundred forty-two thousand, forty-one".