16662216256 has 56 divisors (see below), whose sum is σ = 40010340096. Its totient is φ = 6720890880.

The previous prime is 16662216251. The next prime is 16662216271. The reversal of 16662216256 is 65261226661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (16662216251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086280 + ... + 1101511.

Almost surely, 2^16662216256 is an apocalyptic number.

16662216256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16662216256 is an abundant number, since it is smaller than the sum of its proper divisors (23348123840).

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

16662216256 is a wasteful number, since it uses less digits than its factorization.

16662216256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187827 (or 2187817 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The spelling of 16662216256 in words is "sixteen billion, six hundred sixty-two million, two hundred sixteen thousand, two hundred fifty-six".