1663508747 has 2 divisors, whose sum is σ = 1663508748. Its totient is φ = 1663508746.

The previous prime is 1663508687. The next prime is 1663508753. The reversal of 1663508747 is 7478053661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1663508747 - 2¹⁶ = 1663443211 is a prime.

It is a super-2 number, since 2×1663508747² = 5534522702691020018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1663508797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831754373 + 831754374.

It is an arithmetic number, because the mean of its divisors is an integer number (831754374).

Almost surely, 2^1663508747 is an apocalyptic number.

1663508747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663508747 is an equidigital number, since it uses as much as digits as its factorization.

1663508747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 1663508747 is about 40786.1342492764. The cubic root of 1663508747 is about 1184.8818024975.

The spelling of 1663508747 in words is "one billion, six hundred sixty-three million, five hundred eight thousand, seven hundred forty-seven".