16690984866 has 24 divisors (see below), whose sum is σ = 36363607644. Its totient is φ = 5532922080.

The previous prime is 16690984841. The next prime is 16690984907. The reversal of 16690984866 is 66848909661.

16690984866 is a `hidden beast` number, since 1 + 6 + 69 + 0 + 98 + 486 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13658830641 + 3032154225 = 116871^2 + 55065^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2558281 + ... + 2564796.

Almost surely, 2^16690984866 is an apocalyptic number.

16690984866 is an abundant number, since it is smaller than the sum of its proper divisors (19672622778).

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

16690984866 is a wasteful number, since it uses less digits than its factorization.

16690984866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123266 (or 5123263 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 63.

The spelling of 16690984866 in words is "sixteen billion, six hundred ninety million, nine hundred eighty-four thousand, eight hundred sixty-six".