1663330313 has 4 divisors (see below), whose sum is σ = 1664896128. Its totient is φ = 1661764500.

The previous prime is 1663330309. The next prime is 1663330321. The reversal of 1663330313 is 3130333661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1663330313 - 2² = 1663330309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663330373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781313 + ... + 783438.

It is an arithmetic number, because the mean of its divisors is an integer number (416224032).

Almost surely, 2^1663330313 is an apocalyptic number.

It is an amenable number.

1663330313 is a deficient number, since it is larger than the sum of its proper divisors (1565815).

1663330313 is a wasteful number, since it uses less digits than its factorization.

1663330313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565814.

The product of its (nonzero) digits is 8748, while the sum is 29.

The square root of 1663330313 is about 40783.9467560461. The cubic root of 1663330313 is about 1184.8394360717.

Adding to 1663330313 its reverse (3130333661), we get a palindrome (4793663974).

The spelling of 1663330313 in words is "one billion, six hundred sixty-three million, three hundred thirty thousand, three hundred thirteen".