1663058261 has 2 divisors, whose sum is σ = 1663058262. Its totient is φ = 1663058260.

The previous prime is 1663058233. The next prime is 1663058279. The reversal of 1663058261 is 1628503661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1650878161 + 12180100 = 40631^2 + 3490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1663058261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663058161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831529130 + 831529131.

It is an arithmetic number, because the mean of its divisors is an integer number (831529131).

Almost surely, 2^1663058261 is an apocalyptic number.

It is an amenable number.

1663058261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663058261 is an equidigital number, since it uses as much as digits as its factorization.

1663058261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1663058261 is about 40780.6113367615. The cubic root of 1663058261 is about 1184.7748356511.

The spelling of 1663058261 in words is "one billion, six hundred sixty-three million, fifty-eight thousand, two hundred sixty-one".