1663071218 has 8 divisors (see below), whose sum is σ = 2547683712. Its totient is φ = 813843316.

The previous prime is 1663071217. The next prime is 1663071239. The reversal of 1663071218 is 8121703661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1663071218² = 5531611752280007048, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1663071211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8846030 + ... + 8846217.

It is an arithmetic number, because the mean of its divisors is an integer number (318460464).

Almost surely, 2^1663071218 is an apocalyptic number.

1663071218 is a deficient number, since it is larger than the sum of its proper divisors (884612494).

1663071218 is a wasteful number, since it uses less digits than its factorization.

1663071218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17692296.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1663071218 is about 40780.7701987101. The cubic root of 1663071218 is about 1184.7779125302. Note that the first 3 decimals are identical.

Adding to 1663071218 its reverse (8121703661), we get a palindrome (9784774879).

The spelling of 1663071218 in words is "one billion, six hundred sixty-three million, seventy-one thousand, two hundred eighteen".