155660 has 24 divisors (see below), whose sum is σ = 336336. Its totient is φ = 60480.

The previous prime is 155657. The next prime is 155663. The reversal of 155660 is 66551.

It is an interprime number because it is at equal distance from previous prime (155657) and next prime (155663).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155660.

It is not an unprimeable number, because it can be changed into a prime (155663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770 + ... + 950.

It is an arithmetic number, because the mean of its divisors is an integer number (14014).

2¹⁵⁵⁶⁶⁰ is an apocalyptic number.

155660 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 155660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168168).

155660 is an abundant number, since it is smaller than the sum of its proper divisors (180676).

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

155660 is a wasteful number, since it uses less digits than its factorization.

155660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 155660 is about 394.5377041551. The cubic root of 155660 is about 53.7929888645.

The spelling of 155660 in words is "one hundred fifty-five thousand, six hundred sixty".