660155 has 8 divisors (see below), whose sum is σ = 834000. Its totient is φ = 500256.

The previous prime is 660137. The next prime is 660157. The reversal of 660155 is 551066.

660155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660155 - 2⁸ = 659899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660155.

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 7 ways as a sum of consecutive naturals, for example, 3380 + ... + 3569.

It is an arithmetic number, because the mean of its divisors is an integer number (104250).

2⁶⁶⁰¹⁵⁵ is an apocalyptic number.

660155 is a deficient number, since it is larger than the sum of its proper divisors (173845).

660155 is a wasteful number, since it uses less digits than its factorization.

660155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973.

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

The square root of 660155 is about 812.4992307689. The cubic root of 660155 is about 87.0726921413.

The spelling of 660155 in words is "six hundred sixty thousand, one hundred fifty-five".