16666918585 has 8 divisors (see below), whose sum is σ = 20645473536. Its totient is φ = 12903420720.

The previous prime is 16666918573. The next prime is 16666918603. The reversal of 16666918585 is 58581966661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16666918585 - 2¹¹ = 16666916537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53764099 + ... + 53764408.

It is an arithmetic number, because the mean of its divisors is an integer number (2580684192).

Almost surely, 2^16666918585 is an apocalyptic number.

It is an amenable number.

16666918585 is a deficient number, since it is larger than the sum of its proper divisors (3978554951).

16666918585 is a wasteful number, since it uses less digits than its factorization.

16666918585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107528543.

The product of its digits is 18662400, while the sum is 61.

The spelling of 16666918585 in words is "sixteen billion, six hundred sixty-six million, nine hundred eighteen thousand, five hundred eighty-five".