16686659546 has 16 divisors (see below), whose sum is σ = 25345763520. Its totient is φ = 8238464640.

The previous prime is 16686659453. The next prime is 16686659569. The reversal of 16686659546 is 64595668661.

It is a happy number.

It is a super-2 number, since 2×16686659546² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 12800 + ... + 183131.

It is an arithmetic number, because the mean of its divisors is an integer number (1584110220).

Almost surely, 2^16686659546 is an apocalyptic number.

16686659546 is a deficient number, since it is larger than the sum of its proper divisors (8659103974).

16686659546 is a wasteful number, since it uses less digits than its factorization.

16686659546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196469.

The product of its digits is 55987200, while the sum is 62.

The spelling of 16686659546 in words is "sixteen billion, six hundred eighty-six million, six hundred fifty-nine thousand, five hundred forty-six".