1653668663 has 2 divisors, whose sum is σ = 1653668664. Its totient is φ = 1653668662.

The previous prime is 1653668647. The next prime is 1653668669. The reversal of 1653668663 is 3668663561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1653668663 - 2⁴ = 1653668647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1653668669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826834331 + 826834332.

It is an arithmetic number, because the mean of its divisors is an integer number (826834332).

Almost surely, 2^1653668663 is an apocalyptic number.

1653668663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1653668663 is an equidigital number, since it uses as much as digits as its factorization.

1653668663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 50.

The square root of 1653668663 is about 40665.3250694003. The cubic root of 1653668663 is about 1182.5408867143.

The spelling of 1653668663 in words is "one billion, six hundred fifty-three million, six hundred sixty-eight thousand, six hundred sixty-three".