16663804263890 has 32 divisors (see below), whose sum is σ = 34280829483264. Its totient is φ = 5713137057600.

The previous prime is 16663804263871. The next prime is 16663804263919. The reversal of 16663804263890 is 9836240836661.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1064561 + ... + 5870340.

It is an arithmetic number, because the mean of its divisors is an integer number (1071275921352).

Almost surely, 2^{16663804263890} is an apocalyptic number.

16663804263890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16663804263890 is an abundant number, since it is smaller than the sum of its proper divisors (17617025219374).

16663804263890 is a wasteful number, since it uses less digits than its factorization.

16663804263890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6969242.

The product of its (nonzero) digits is 53747712, while the sum is 62.

The spelling of 16663804263890 in words is "sixteen trillion, six hundred sixty-three billion, eight hundred four million, two hundred sixty-three thousand, eight hundred ninety".