667056 has 40 divisors (see below), whose sum is σ = 1857520. Its totient is φ = 205056.

The previous prime is 667021. The next prime is 667081. The reversal of 667056 is 650766.

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, 90 + ... + 1158.

It is an arithmetic number, because the mean of its divisors is an integer number (46438).

2⁶⁶⁷⁰⁵⁶ 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 667056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928760).

667056 is an abundant number, since it is smaller than the sum of its proper divisors (1190464).

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

667056 is a wasteful number, since it uses less digits than its factorization.

667056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 667056 is about 816.7349631306. The cubic root of 667056 is about 87.3750488640.

Subtracting from 667056 its reverse (650766), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 667056 in words is "six hundred sixty-seven thousand, fifty-six".