16661200 has 60 divisors (see below), whose sum is σ = 41791968. Its totient is φ = 6371200.

The previous prime is 16661147. The next prime is 16661213. The reversal of 16661200 is 216661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8295 + ... + 10105.

Almost surely, 2^16661200 is an apocalyptic number.

16661200 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 16661200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20895984).

16661200 is an abundant number, since it is smaller than the sum of its proper divisors (25130768).

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

16661200 is a wasteful number, since it uses less digits than its factorization.

16661200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852 (or 1841 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 16661200 is about 4081.8133225320. The cubic root of 16661200 is about 255.4085466890.

Adding to 16661200 its reverse (216661), we get a palindrome (16877861).

It can be divided in two parts, 16661 and 200, that added together give a palindrome (16861).

The spelling of 16661200 in words is "sixteen million, six hundred sixty-one thousand, two hundred".