16665273061 has 4 divisors (see below), whose sum is σ = 16678968012. Its totient is φ = 16651578112.

The previous prime is 16665273059. The next prime is 16665273071. The reversal of 16665273061 is 16037256661.

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 3262580161 + 13402692900 = 57119^2 + 115770^2 .

It is a cyclic number.

It is not a de Polignac number, because 16665273061 - 2¹ = 16665273059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16665272999 and 16665273017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665273071) 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, 6845650 + ... + 6848083.

It is an arithmetic number, because the mean of its divisors is an integer number (4169742003).

Almost surely, 2^16665273061 is an apocalyptic number.

It is an amenable number.

16665273061 is a deficient number, since it is larger than the sum of its proper divisors (13694951).

16665273061 is a wasteful number, since it uses less digits than its factorization.

16665273061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13694950.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 16665273061 in words is "sixteen billion, six hundred sixty-five million, two hundred seventy-three thousand, sixty-one".