16606777085 has 4 divisors (see below), whose sum is σ = 19928132508. Its totient is φ = 13285421664.

The previous prime is 16606777069. The next prime is 16606777091. The reversal of 16606777085 is 58077760661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5274535876 + 11332241209 = 72626^2 + 106453^2 .

It is a cyclic number.

It is not a de Polignac number, because 16606777085 - 2⁴ = 16606777069 is a prime.

It is a Duffinian number.

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, 1660677704 + ... + 1660677713.

It is an arithmetic number, because the mean of its divisors is an integer number (4982033127).

Almost surely, 2^16606777085 is an apocalyptic number.

It is an amenable number.

16606777085 is a deficient number, since it is larger than the sum of its proper divisors (3321355423).

16606777085 is an equidigital number, since it uses as much as digits as its factorization.

16606777085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321355422.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 16606777085 in words is "sixteen billion, six hundred six million, seven hundred seventy-seven thousand, eighty-five".