16678702408 has 16 divisors (see below), whose sum is σ = 31431313980. Its totient is φ = 8297018688.

The previous prime is 16678702393. The next prime is 16678702421. The reversal of 16678702408 is 80420787661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16676623044 + 2079364 = 129138^2 + 1442^2 .

It is a super-2 number, since 2×16678702408² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5289891 + ... + 5293042.

Almost surely, 2^16678702408 is an apocalyptic number.

It is an amenable number.

16678702408 is a deficient number, since it is larger than the sum of its proper divisors (14752611572).

16678702408 is a wasteful number, since it uses less digits than its factorization.

16678702408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10583136 (or 10583132 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 16678702408 in words is "sixteen billion, six hundred seventy-eight million, seven hundred two thousand, four hundred eight".