1663460741 has 2 divisors, whose sum is σ = 1663460742. Its totient is φ = 1663460740.

The previous prime is 1663460653. The next prime is 1663460749. The reversal of 1663460741 is 1470643661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1579665025 + 83795716 = 39745^2 + 9154^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663460741 - 2¹⁰ = 1663459717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1663460695 and 1663460704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663460749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831730370 + 831730371.

It is an arithmetic number, because the mean of its divisors is an integer number (831730371).

Almost surely, 2^1663460741 is an apocalyptic number.

It is an amenable number.

1663460741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663460741 is an equidigital number, since it uses as much as digits as its factorization.

1663460741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 1663460741 is about 40785.5457362041. The cubic root of 1663460741 is about 1184.8704045045.

The spelling of 1663460741 in words is "one billion, six hundred sixty-three million, four hundred sixty thousand, seven hundred forty-one".