1663495699 has 2 divisors, whose sum is σ = 1663495700. Its totient is φ = 1663495698.

The previous prime is 1663495663. The next prime is 1663495741. The reversal of 1663495699 is 9965943661.

It is a weak prime.

It is an emirp because it is prime and its reverse (9965943661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1663495699 - 2⁷ = 1663495571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1663495609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831747849 + 831747850.

It is an arithmetic number, because the mean of its divisors is an integer number (831747850).

Almost surely, 2^1663495699 is an apocalyptic number.

1663495699 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663495699 is an equidigital number, since it uses as much as digits as its factorization.

1663495699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9447840, while the sum is 58.

The square root of 1663495699 is about 40785.9742926413. The cubic root of 1663495699 is about 1184.8787045520.

The spelling of 1663495699 in words is "one billion, six hundred sixty-three million, four hundred ninety-five thousand, six hundred ninety-nine".