1663322117 has 2 divisors, whose sum is σ = 1663322118. Its totient is φ = 1663322116.

The previous prime is 1663322113. The next prime is 1663322131. The reversal of 1663322117 is 7112233661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1572043201 + 91278916 = 39649^2 + 9554^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663322117 - 2² = 1663322113 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663322113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831661058 + 831661059.

It is an arithmetic number, because the mean of its divisors is an integer number (831661059).

Almost surely, 2^1663322117 is an apocalyptic number.

It is an amenable number.

1663322117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663322117 is an equidigital number, since it uses as much as digits as its factorization.

1663322117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 1663322117 is about 40783.8462752105. The cubic root of 1663322117 is about 1184.8374899840.

Adding to 1663322117 its reverse (7112233661), we get a palindrome (8775555778).

The spelling of 1663322117 in words is "one billion, six hundred sixty-three million, three hundred twenty-two thousand, one hundred seventeen".