1663340485 has 4 divisors (see below), whose sum is σ = 1996008588. Its totient is φ = 1330672384.

The previous prime is 1663340467. The next prime is 1663340507. The reversal of 1663340485 is 5840433661.

1663340485 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5840433661 = 30851 ⋅189311.

It can be written as a sum of positive squares in 2 ways, for example, as 454457124 + 1208883361 = 21318^2 + 34769^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663340485 - 2⁵ = 1663340453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166334044 + ... + 166334053.

It is an arithmetic number, because the mean of its divisors is an integer number (499002147).

Almost surely, 2^1663340485 is an apocalyptic number.

It is an amenable number.

1663340485 is a deficient number, since it is larger than the sum of its proper divisors (332668103).

1663340485 is an equidigital number, since it uses as much as digits as its factorization.

1663340485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332668102.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 1663340485 is about 40784.0714617852. The cubic root of 1663340485 is about 1184.8418513391.

The spelling of 1663340485 in words is "one billion, six hundred sixty-three million, three hundred forty thousand, four hundred eighty-five".