16773666 has 64 divisors (see below), whose sum is σ = 42663936. Its totient is φ = 4276800.

The previous prime is 16773661. The next prime is 16773667. The reversal of 16773666 is 66637761.

It is a Harshad number since it is a multiple of its sum of digits (42).

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

It is a nialpdrome in base 16.

It is a zygodrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16773661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16431 + ... + 17421.

It is an arithmetic number, because the mean of its divisors is an integer number (666624).

Almost surely, 2^16773666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16773666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21331968).

16773666 is an abundant number, since it is smaller than the sum of its proper divisors (25890270).

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

16773666 is a wasteful number, since it uses less digits than its factorization.

16773666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047.

The product of its digits is 190512, while the sum is 42.

The square root of 16773666 is about 4095.5666274644. The cubic root of 16773666 is about 255.9819424926.

The spelling of 16773666 in words is "sixteen million, seven hundred seventy-three thousand, six hundred sixty-six".