16616566506 has 8 divisors (see below), whose sum is σ = 33233133024. Its totient is φ = 5538855500.

The previous prime is 16616566481. The next prime is 16616566511. The reversal of 16616566506 is 60566561661.

It is a sphenic number, since it is the product of 3 distinct primes.

16616566506 is an admirable number.

It is a super-2 number, since 2×16616566506² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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, 1384713870 + ... + 1384713881.

It is an arithmetic number, because the mean of its divisors is an integer number (4154141628).

Almost surely, 2^16616566506 is an apocalyptic number.

16616566506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16616566506 is a wasteful number, since it uses less digits than its factorization.

16616566506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769427756.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 16616566506 in words is "sixteen billion, six hundred sixteen million, five hundred sixty-six thousand, five hundred six".