16660616506 has 16 divisors (see below), whose sum is σ = 25405025760. Its totient is φ = 8192677680.

The previous prime is 16660616503. The next prime is 16660616527. The reversal of 16660616506 is 60561606661.

16660616506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16660616506² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16660616503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17485 + ... + 183376.

It is an arithmetic number, because the mean of its divisors is an integer number (1587814110).

Almost surely, 2^16660616506 is an apocalyptic number.

16660616506 is a deficient number, since it is larger than the sum of its proper divisors (8744409254).

16660616506 is a wasteful number, since it uses less digits than its factorization.

16660616506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201549.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 16660616506 in words is "sixteen billion, six hundred sixty million, six hundred sixteen thousand, five hundred six".