667446 has 32 divisors (see below), whose sum is σ = 1478400. Its totient is φ = 199584.

The previous prime is 667441. The next prime is 667463. The reversal of 667446 is 644766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3255 + ... + 3453.

It is an arithmetic number, because the mean of its divisors is an integer number (46200).

2⁶⁶⁷⁴⁴⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739200).

667446 is an abundant number, since it is smaller than the sum of its proper divisors (810954).

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

667446 is a wasteful number, since it uses less digits than its factorization.

667446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260.

The product of its digits is 24192, while the sum is 33.

The square root of 667446 is about 816.9736837867. The cubic root of 667446 is about 87.3920737366.

The spelling of 667446 in words is "six hundred sixty-seven thousand, four hundred forty-six".