16656081773 has 4 divisors (see below), whose sum is σ = 16701466560. Its totient is φ = 16610696988.

The previous prime is 16656081737. The next prime is 16656081779. The reversal of 16656081773 is 37718065661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16656081773 - 2¹⁴ = 16656065389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16656081779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22691843 + ... + 22692576.

It is an arithmetic number, because the mean of its divisors is an integer number (4175366640).

Almost surely, 2^16656081773 is an apocalyptic number.

It is an amenable number.

16656081773 is a deficient number, since it is larger than the sum of its proper divisors (45384787).

16656081773 is an equidigital number, since it uses as much as digits as its factorization.

16656081773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45384786.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 16656081773 in words is "sixteen billion, six hundred fifty-six million, eighty-one thousand, seven hundred seventy-three".