660156 has 48 divisors (see below), whose sum is σ = 1827840. Its totient is φ = 181440.

The previous prime is 660137. The next prime is 660157. The reversal of 660156 is 651066.

660156 = T₂₀₃ + T₂₀₄ + ... + T₂₃₀.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2301 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (38080).

2⁶⁶⁰¹⁵⁶ is an apocalyptic number.

It is a pronic number, being equal to 812×813.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913920).

660156 is an abundant number, since it is smaller than the sum of its proper divisors (1167684).

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

660156 is a wasteful number, since it uses less digits than its factorization.

660156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 660156 is about 812.4998461538. The cubic root of 660156 is about 87.0727361071.

The spelling of 660156 in words is "six hundred sixty thousand, one hundred fifty-six".