1663480639 has 2 divisors, whose sum is σ = 1663480640. Its totient is φ = 1663480638.

The previous prime is 1663480603. The next prime is 1663480657. The reversal of 1663480639 is 9360843661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1663480639 - 2¹¹ = 1663478591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663483639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831740319 + 831740320.

It is an arithmetic number, because the mean of its divisors is an integer number (831740320).

Almost surely, 2^1663480639 is an apocalyptic number.

1663480639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663480639 is an equidigital number, since it uses as much as digits as its factorization.

1663480639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 1663480639 is about 40785.7896699328. The cubic root of 1663480639 is about 1184.8751288836.

The spelling of 1663480639 in words is "one billion, six hundred sixty-three million, four hundred eighty thousand, six hundred thirty-nine".