667674 has 36 divisors (see below), whose sum is σ = 1685034. Its totient is φ = 190512.

The previous prime is 667673. The next prime is 667687. The reversal of 667674 is 476766.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 127449 = 735^2 + 357^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 504 + ... + 1260.

2⁶⁶⁷⁶⁷⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842517).

667674 is an abundant number, since it is smaller than the sum of its proper divisors (1017360).

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

667674 is a wasteful number, since it uses less digits than its factorization.

667674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 769 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 667674 is about 817.1132112504. The cubic root of 667674 is about 87.4020236673.

The spelling of 667674 in words is "six hundred sixty-seven thousand, six hundred seventy-four".