16601000 has 64 divisors (see below), whose sum is σ = 41867280. Its totient is φ = 6124800.

The previous prime is 16600951. The next prime is 16601029. The reversal of 16601000 is 10661.

It can be written as a sum of positive squares in 8 ways, for example, as 68644 + 16532356 = 262^2 + 4066^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12362 + ... + 13638.

Almost surely, 2^16601000 is an apocalyptic number.

16601000 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 16601000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20933640).

16601000 is an abundant number, since it is smaller than the sum of its proper divisors (25266280).

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

16601000 is a wasteful number, since it uses less digits than its factorization.

16601000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 16601000 is about 4074.4324758180. The cubic root of 16601000 is about 255.1005626690.

Adding to 16601000 its reverse (10661), we get a palindrome (16611661).

The spelling of 16601000 in words is "sixteen million, six hundred one thousand".