660115 has 12 divisors (see below), whose sum is σ = 824544. Its totient is φ = 507104.

The previous prime is 660103. The next prime is 660119. The reversal of 660115 is 511066.

It is not a de Polignac number, because 660115 - 2¹⁷ = 529043 is a prime.

It is a Duffinian number.

660115 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 660092 and 660101.

It is not an unprimeable number, because it can be changed into a prime (660119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12429 + ... + 12481.

It is an arithmetic number, because the mean of its divisors is an integer number (68712).

2⁶⁶⁰¹¹⁵ is an apocalyptic number.

660115 is a deficient number, since it is larger than the sum of its proper divisors (164429).

660115 is an equidigital number, since it uses as much as digits as its factorization.

660115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 660115 is about 812.4746149881. The cubic root of 660115 is about 87.0709334745.

The spelling of 660115 in words is "six hundred sixty thousand, one hundred fifteen".