1606549663 has 2 divisors, whose sum is σ = 1606549664. Its totient is φ = 1606549662.

The previous prime is 1606549649. The next prime is 1606549667. The reversal of 1606549663 is 3669456061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1606549663 - 2²⁹ = 1069678751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606549667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803274831 + 803274832.

It is an arithmetic number, because the mean of its divisors is an integer number (803274832).

Almost surely, 2^1606549663 is an apocalyptic number.

1606549663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606549663 is an equidigital number, since it uses as much as digits as its factorization.

1606549663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 1606549663 is about 40081.7871732287. The cubic root of 1606549663 is about 1171.2008667699.

The spelling of 1606549663 in words is "one billion, six hundred six million, five hundred forty-nine thousand, six hundred sixty-three".