667170 has 64 divisors (see below), whose sum is σ = 2039040. Its totient is φ = 152064.

The previous prime is 667141. The next prime is 667171. The reversal of 667170 is 71766.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667171) 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, 1714 + ... + 2066.

It is an arithmetic number, because the mean of its divisors is an integer number (31860).

2⁶⁶⁷¹⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1019520).

667170 is an abundant number, since it is smaller than the sum of its proper divisors (1371870).

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

667170 is a wasteful number, since it uses less digits than its factorization.

667170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 667170 is about 816.8047502310. The cubic root of 667170 is about 87.3800260514.

It can be divided in two parts, 6 and 67170, that added together give a palindrome (67176).

The spelling of 667170 in words is "six hundred sixty-seven thousand, one hundred seventy".