16006660585 has 4 divisors (see below), whose sum is σ = 19207992708. Its totient is φ = 12805328464.

The previous prime is 16006660583. The next prime is 16006660601. The reversal of 16006660585 is 58506660061.

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 5131716496 + 10874944089 = 71636^2 + 104283^2 .

It is a cyclic number.

It is not a de Polignac number, because 16006660585 - 2¹ = 16006660583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16006660583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600666054 + ... + 1600666063.

It is an arithmetic number, because the mean of its divisors is an integer number (4801998177).

Almost surely, 2^16006660585 is an apocalyptic number.

It is an amenable number.

16006660585 is a deficient number, since it is larger than the sum of its proper divisors (3201332123).

16006660585 is an equidigital number, since it uses as much as digits as its factorization.

16006660585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201332122.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 16006660585 in words is "sixteen billion, six million, six hundred sixty thousand, five hundred eighty-five".