16685056785 has 8 divisors (see below), whose sum is σ = 26696090880. Its totient is φ = 8898696944.

The previous prime is 16685056771. The next prime is 16685056789. The reversal of 16685056785 is 58765058661.

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

It is a cyclic number.

It is not a de Polignac number, because 16685056785 - 2⁴ = 16685056769 is a prime.

It is a super-2 number, since 2×16685056785² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16685056789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556168545 + ... + 556168574.

It is an arithmetic number, because the mean of its divisors is an integer number (3337011360).

Almost surely, 2^16685056785 is an apocalyptic number.

16685056785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16685056785 is a deficient number, since it is larger than the sum of its proper divisors (10011034095).

16685056785 is a wasteful number, since it uses less digits than its factorization.

16685056785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112337127.

The product of its (nonzero) digits is 12096000, while the sum is 57.

The spelling of 16685056785 in words is "sixteen billion, six hundred eighty-five million, fifty-six thousand, seven hundred eighty-five".