16500066740 has 12 divisors (see below), whose sum is σ = 34650140196. Its totient is φ = 6600026688.

The previous prime is 16500066701. The next prime is 16500066743. The reversal of 16500066740 is 4766000561.

It can be written as a sum of positive squares in 2 ways, for example, as 9555844516 + 6944222224 = 97754^2 + 83332^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16500066740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16500066743) 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, 412501649 + ... + 412501688.

It is an arithmetic number, because the mean of its divisors is an integer number (2887511683).

Almost surely, 2^16500066740 is an apocalyptic number.

16500066740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16500066740 is an abundant number, since it is smaller than the sum of its proper divisors (18150073456).

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

16500066740 is a wasteful number, since it uses less digits than its factorization.

16500066740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825003346 (or 825003344 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 16500066740 in words is "sixteen billion, five hundred million, sixty-six thousand, seven hundred forty".