667580 has 24 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 257600.

The previous prime is 667577. The next prime is 667631. The reversal of 667580 is 85766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5 + ... + 1155.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁶⁶⁷⁵⁸⁰ 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 667580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725760).

667580 is an abundant number, since it is smaller than the sum of its proper divisors (783940).

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

667580 is a wasteful number, since it uses less digits than its factorization.

667580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189 (or 1187 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 667580 is about 817.0556896565. The cubic root of 667580 is about 87.3979217773.

The spelling of 667580 in words is "six hundred sixty-seven thousand, five hundred eighty".