16556066506 has 16 divisors (see below), whose sum is σ = 28674426816. Its totient is φ = 7022307456.

The previous prime is 16556066503. The next prime is 16556066533. The reversal of 16556066506 is 60566065561.

It is not an unprimeable number, because it can be changed into a prime (16556066503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6094396 + ... + 6097111.

It is an arithmetic number, because the mean of its divisors is an integer number (1792151676).

Almost surely, 2^16556066506 is an apocalyptic number.

16556066506 is a deficient number, since it is larger than the sum of its proper divisors (12118360310).

16556066506 is a wasteful number, since it uses less digits than its factorization.

16556066506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12191613.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 16556066506 in words is "sixteen billion, five hundred fifty-six million, sixty-six thousand, five hundred six".