16603639471866 has 64 divisors (see below), whose sum is σ = 36116121600000. Its totient is φ = 5073403230720.

The previous prime is 16603639471829. The next prime is 16603639471873. The reversal of 16603639471866 is 66817493630661.

It is a junction number, because it is equal to n+sod(n) for n = 16603639471797 and 16603639471806.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18399991 + ... + 19281258.

It is an arithmetic number, because the mean of its divisors is an integer number (564314400000).

Almost surely, 2^{16603639471866} is an apocalyptic number.

16603639471866 is an abundant number, since it is smaller than the sum of its proper divisors (19512482128134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16603639471866 is a wasteful number, since it uses less digits than its factorization.

16603639471866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37681411.

The product of its (nonzero) digits is 141087744, while the sum is 66.

The spelling of 16603639471866 in words is "sixteen trillion, six hundred three billion, six hundred thirty-nine million, four hundred seventy-one thousand, eight hundred sixty-six".