16980656 has 90 divisors (see below), whose sum is σ = 42301980. Its totient is φ = 6578880.

The previous prime is 16980641. The next prime is 16980679. The reversal of 16980656 is 65608961.

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, 94775 + ... + 94953.

It is an arithmetic number, because the mean of its divisors is an integer number (470022).

Almost surely, 2^16980656 is an apocalyptic number.

16980656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16980656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21150990).

16980656 is an abundant number, since it is smaller than the sum of its proper divisors (25321324).

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

16980656 is a wasteful number, since it uses less digits than its factorization.

16980656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 16980656 is about 4120.7591533600. The cubic root of 16980656 is about 257.0305948527.

It can be divided in two parts, 169 and 80656, that multiplied together give a square (13630864 = 3692²).

The spelling of 16980656 in words is "sixteen million, nine hundred eighty thousand, six hundred fifty-six".