16680388 has 12 divisors (see below), whose sum is σ = 29869840. Its totient is φ = 8146152.

The previous prime is 16680373. The next prime is 16680403. The reversal of 16680388 is 88308661.

It is an interprime number because it is at equal distance from previous prime (16680373) and next prime (16680403).

It is a self number, because there is not a number n which added to its sum of digits gives 16680388.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48318 + ... + 48661.

Almost surely, 2^16680388 is an apocalyptic number.

It is an amenable number.

16680388 is a deficient number, since it is larger than the sum of its proper divisors (13189452).

16680388 is a wasteful number, since it uses less digits than its factorization.

16680388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97026 (or 97024 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 16680388 is about 4084.1630721606. The cubic root of 16680388 is about 255.5065568174.

The spelling of 16680388 in words is "sixteen million, six hundred eighty thousand, three hundred eighty-eight".