16616922655 has 4 divisors (see below), whose sum is σ = 19940307192. Its totient is φ = 13293538120.

The previous prime is 16616922611. The next prime is 16616922661. The reversal of 16616922655 is 55622961661.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-16616922655 is a prime.

It is a super-2 number, since 2×16616922655² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16616922599 and 16616922608.

It is a congruent 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, 1661692261 + ... + 1661692270.

It is an arithmetic number, because the mean of its divisors is an integer number (4985076798).

Almost surely, 2^16616922655 is an apocalyptic number.

16616922655 is a deficient number, since it is larger than the sum of its proper divisors (3323384537).

16616922655 is an equidigital number, since it uses as much as digits as its factorization.

16616922655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323384536.

The product of its digits is 1166400, while the sum is 49.

The spelling of 16616922655 in words is "sixteen billion, six hundred sixteen million, nine hundred twenty-two thousand, six hundred fifty-five".