16766565072 has 20 divisors (see below), whose sum is σ = 43313626560. Its totient is φ = 5588855008.

The previous prime is 16766565043. The next prime is 16766565077. The reversal of 16766565072 is 27056566761.

It is a super-3 number, since 3×16766565072³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16766565077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174651672 + ... + 174651767.

It is an arithmetic number, because the mean of its divisors is an integer number (2165681328).

Almost surely, 2^16766565072 is an apocalyptic number.

16766565072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16766565072 is an abundant number, since it is smaller than the sum of its proper divisors (26547061488).

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

16766565072 is a wasteful number, since it uses less digits than its factorization.

16766565072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349303450 (or 349303444 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 16766565072 in words is "sixteen billion, seven hundred sixty-six million, five hundred sixty-five thousand, seventy-two".