16506026660 has 12 divisors (see below), whose sum is σ = 34662656028. Its totient is φ = 6602410656.

The previous prime is 16506026639. The next prime is 16506026683. The reversal of 16506026660 is 6662060561.

It can be written as a sum of positive squares in 2 ways, for example, as 6796683364 + 9709343296 = 82442^2 + 98536^2 .

It is a super-2 number, since 2×16506026660² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412650647 + ... + 412650686.

It is an arithmetic number, because the mean of its divisors is an integer number (2888554669).

Almost surely, 2^16506026660 is an apocalyptic number.

16506026660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16506026660 is an abundant number, since it is smaller than the sum of its proper divisors (18156629368).

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

16506026660 is a wasteful number, since it uses less digits than its factorization.

16506026660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825301342 (or 825301340 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 16506026660 in words is "sixteen billion, five hundred six million, twenty-six thousand, six hundred sixty".