16637467668 has 72 divisors (see below), whose sum is σ = 39678020928. Its totient is φ = 5424976512.

The previous prime is 16637467661. The next prime is 16637467711. The reversal of 16637467668 is 86676473661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16637467661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16924705 + ... + 16925687.

It is an arithmetic number, because the mean of its divisors is an integer number (551083624).

Almost surely, 2^16637467668 is an apocalyptic number.

It is an amenable number.

16637467668 is an abundant number, since it is smaller than the sum of its proper divisors (23040553260).

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

16637467668 is a wasteful number, since it uses less digits than its factorization.

16637467668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1200 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 60.

The spelling of 16637467668 in words is "sixteen billion, six hundred thirty-seven million, four hundred sixty-seven thousand, six hundred sixty-eight".