16660980 has 108 divisors (see below), whose sum is σ = 58820580. Its totient is φ = 3806208.

The previous prime is 16660979. The next prime is 16661083. The reversal of 16660980 is 8906661.

It can be written as a sum of positive squares in 2 ways, for example, as 7001316 + 9659664 = 2646^2 + 3108^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7876 + ... + 9764.

It is an arithmetic number, because the mean of its divisors is an integer number (544635).

Almost surely, 2^16660980 is an apocalyptic number.

16660980 is a gapful number since it is divisible by the number (10) 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 16660980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29410290).

16660980 is an abundant number, since it is smaller than the sum of its proper divisors (42159600).

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

16660980 is a wasteful number, since it uses less digits than its factorization.

16660980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1906 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 16660980 is about 4081.7863736359. The cubic root of 16660980 is about 255.4074225177.

The spelling of 16660980 in words is "sixteen million, six hundred sixty thousand, nine hundred eighty".