16660657552 has 80 divisors (see below), whose sum is σ = 40552833024. Its totient is φ = 6441552000.

The previous prime is 16660657523. The next prime is 16660657589. The reversal of 16660657552 is 25575606661.

It is a junction number, because it is equal to n+sod(n) for n = 16660657496 and 16660657505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109777 + ... + 213007.

Almost surely, 2^16660657552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16660657552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20276416512).

16660657552 is an abundant number, since it is smaller than the sum of its proper divisors (23892175472).

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

16660657552 is a wasteful number, since it uses less digits than its factorization.

16660657552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103388 (or 103382 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 16660657552 in words is "sixteen billion, six hundred sixty million, six hundred fifty-seven thousand, five hundred fifty-two".