16678405674 has 36 divisors (see below), whose sum is σ = 42036392034. Its totient is φ = 4765258512.

The previous prime is 16678405663. The next prime is 16678405693. The reversal of 16678405674 is 47650487661.

16678405674 is a `hidden beast` number, since 1 + 6 + 6 + 78 + 4 + 0 + 567 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13257910449 + 3420495225 = 115143^2 + 58485^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16678405674.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9453997 + ... + 9455760.

Almost surely, 2^16678405674 is an apocalyptic number.

16678405674 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16678405674 is an abundant number, since it is smaller than the sum of its proper divisors (25357986360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16678405674 is a wasteful number, since it uses less digits than its factorization.

16678405674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18909779 (or 18909769 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 16678405674 in words is "sixteen billion, six hundred seventy-eight million, four hundred five thousand, six hundred seventy-four".