16641000 has 144 divisors (see below), whose sum is σ = 57585060. Its totient is φ = 4334400.

The previous prime is 16640999. The next prime is 16641019. The reversal of 16641000 is 14661.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

16641000 is a `hidden beast` number, since 1 + 664 + 1 + 0 + 0 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11249316 + 5391684 = 3354^2 + 2322^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 386979 + ... + 387021.

Almost surely, 2^16641000 is an apocalyptic number.

16641000 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 16641000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28792530).

16641000 is an abundant number, since it is smaller than the sum of its proper divisors (40944060).

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

16641000 is a wasteful number, since it uses less digits than its factorization.

16641000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 16641000 is about 4079.3381816172. The cubic root of 16641000 is about 255.3052860381.

Adding to 16641000 its reverse (14661), we get a palindrome (16655661).

The spelling of 16641000 in words is "sixteen million, six hundred forty-one thousand".