1663068506503 has 2 divisors, whose sum is σ = 1663068506504. Its totient is φ = 1663068506502.

The previous prime is 1663068506413. The next prime is 1663068506521. The reversal of 1663068506503 is 3056058603661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1663068506503 - 2¹⁷ = 1663068375431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663068006503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831534253251 + 831534253252.

It is an arithmetic number, because the mean of its divisors is an integer number (831534253252).

Almost surely, 2^{1663068506503} is an apocalyptic number.

1663068506503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663068506503 is an equidigital number, since it uses as much as digits as its factorization.

1663068506503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 1663068506503 in words is "one trillion, six hundred sixty-three billion, sixty-eight million, five hundred six thousand, five hundred three".