1655005663 has 2 divisors, whose sum is σ = 1655005664. Its totient is φ = 1655005662.

The previous prime is 1655005643. The next prime is 1655005673. The reversal of 1655005663 is 3665005561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1655005663 - 2⁹ = 1655005151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655005643) 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, 827502831 + 827502832.

It is an arithmetic number, because the mean of its divisors is an integer number (827502832).

Almost surely, 2^1655005663 is an apocalyptic number.

1655005663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655005663 is an equidigital number, since it uses as much as digits as its factorization.

1655005663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 1655005663 is about 40681.7608148910. The cubic root of 1655005663 is about 1182.8594977506.

The spelling of 1655005663 in words is "one billion, six hundred fifty-five million, five thousand, six hundred sixty-three".