161660 has 24 divisors (see below), whose sum is σ = 347760. Its totient is φ = 63104.

The previous prime is 161659. The next prime is 161683. The reversal of 161660 is 66161.

It is a super-2 number, since 2×161660² = 52267911200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a plaindrome in base 16.

It is a congruent number.

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, 1112 + ... + 1248.

It is an arithmetic number, because the mean of its divisors is an integer number (14490).

2¹⁶¹⁶⁶⁰ is an apocalyptic number.

161660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161660 is an abundant number, since it is smaller than the sum of its proper divisors (186100).

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

161660 is a wasteful number, since it uses less digits than its factorization.

161660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 161660 is about 402.0696457083. The cubic root of 161660 is about 54.4754539747.

The spelling of 161660 in words is "one hundred sixty-one thousand, six hundred sixty".