660158 has 8 divisors (see below), whose sum is σ = 1004400. Its totient is φ = 325360.

The previous prime is 660157. The next prime is 660167. The reversal of 660158 is 851066.

660158 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 congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660158.

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 3 ways as a sum of consecutive naturals, for example, 2183 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (125550).

2⁶⁶⁰¹⁵⁸ is an apocalyptic number.

660158 is a deficient number, since it is larger than the sum of its proper divisors (344242).

660158 is a wasteful number, since it uses less digits than its factorization.

660158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 660158 is about 812.5010769224. The cubic root of 660158 is about 87.0728240385.

It can be divided in two parts, 660 and 158, that added together give a palindrome (818).

The spelling of 660158 in words is "six hundred sixty thousand, one hundred fifty-eight".