667400 has 48 divisors (see below), whose sum is σ = 1607040. Its totient is φ = 257600.

The previous prime is 667379. The next prime is 667417. The reversal of 667400 is 4766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9365 + ... + 9435.

It is an arithmetic number, because the mean of its divisors is an integer number (33480).

2⁶⁶⁷⁴⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803520).

667400 is an abundant number, since it is smaller than the sum of its proper divisors (939640).

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

667400 is a wasteful number, since it uses less digits than its factorization.

667400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 667400 is about 816.9455306200. The cubic root of 667400 is about 87.3900660197.

The spelling of 667400 in words is "six hundred sixty-seven thousand, four hundred".