667140 has 24 divisors (see below), whose sum is σ = 1868160. Its totient is φ = 177888.

The previous prime is 667129. The next prime is 667141. The reversal of 667140 is 41766.

It is a self number, because there is not a number n which added to its sum of digits gives 667140.

It is not an unprimeable number, because it can be changed into a prime (667141) 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 7 ways as a sum of consecutive naturals, for example, 5500 + ... + 5619.

It is an arithmetic number, because the mean of its divisors is an integer number (77840).

2⁶⁶⁷¹⁴⁰ is an apocalyptic number.

667140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667140 is an abundant number, since it is smaller than the sum of its proper divisors (1201020).

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

667140 is a wasteful number, since it uses less digits than its factorization.

667140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11131 (or 11129 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 667140 is about 816.7863857827. The cubic root of 667140 is about 87.3787163202.

The spelling of 667140 in words is "six hundred sixty-seven thousand, one hundred forty".