1118220663 has 16 divisors (see below), whose sum is σ = 1740211200. Its totient is φ = 625387296.

The previous prime is 1118220637. The next prime is 1118220709. The reversal of 1118220663 is 3660228111.

It is not a de Polignac number, because 1118220663 - 2¹⁴ = 1118204279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1118220663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118220163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565488 + ... + 567461.

It is an arithmetic number, because the mean of its divisors is an integer number (108763200).

Almost surely, 2^1118220663 is an apocalyptic number.

1118220663 is a deficient number, since it is larger than the sum of its proper divisors (621990537).

1118220663 is a wasteful number, since it uses less digits than its factorization.

1118220663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133006.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1118220663 is about 33439.8065634357. The cubic root of 1118220663 is about 1037.9485766826.

Adding to 1118220663 its reverse (3660228111), we get a palindrome (4778448774).

The spelling of 1118220663 in words is "one billion, one hundred eighteen million, two hundred twenty thousand, six hundred sixty-three".