16666992 has 80 divisors (see below), whose sum is σ = 49059360. Its totient is φ = 5414400.

The previous prime is 16666961. The next prime is 16666997. The reversal of 16666992 is 29966661.

Added to its reverse (29966661) it gives a triangular number (46633653 = T₉₆₅₇).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17242 + ... + 18182.

It is an arithmetic number, because the mean of its divisors is an integer number (613242).

Almost surely, 2^16666992 is an apocalyptic number.

16666992 is a gapful number since it is divisible by the number (12) 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 16666992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24529680).

16666992 is an abundant number, since it is smaller than the sum of its proper divisors (32392368).

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

16666992 is a wasteful number, since it uses less digits than its factorization.

16666992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 987 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 16666992 is about 4082.5227494773. The cubic root of 16666992 is about 255.4381394937.

Adding to 16666992 its reverse (29966661), we get a triangular number (46633653 = T₉₆₅₇).

The spelling of 16666992 in words is "sixteen million, six hundred sixty-six thousand, nine hundred ninety-two".