163660 has 36 divisors (see below), whose sum is σ = 402192. Its totient is φ = 55776.

The previous prime is 163643. The next prime is 163661. The reversal of 163660 is 66361.

163660 = T₅₆ + T₅₇ + ... + T₁₀₄.

It is not an unprimeable number, because it can be changed into a prime (163661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 897 + ... + 1063.

It is an arithmetic number, because the mean of its divisors is an integer number (11172).

2¹⁶³⁶⁶⁰ is an apocalyptic number.

163660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201096).

163660 is an abundant number, since it is smaller than the sum of its proper divisors (238532).

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

163660 is a wasteful number, since it uses less digits than its factorization.

163660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 163660 is about 404.5491317504. The cubic root of 163660 is about 54.6991841701.

The spelling of 163660 in words is "one hundred sixty-three thousand, six hundred sixty".