660275 has 30 divisors (see below), whose sum is σ = 1041972. Its totient is φ = 411600.

The previous prime is 660271. The next prime is 660277. The reversal of 660275 is 572066.

It is not a de Polignac number, because 660275 - 2² = 660271 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (660271) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 60020 + ... + 60030.

2⁶⁶⁰²⁷⁵ is an apocalyptic number.

660275 is a deficient number, since it is larger than the sum of its proper divisors (381697).

660275 is an equidigital number, since it uses as much as digits as its factorization.

660275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 660275 is about 812.5730736371. The cubic root of 660275 is about 87.0779677155.

Subtracting from 660275 its reverse (572066), we obtain a square (88209 = 297²).

The spelling of 660275 in words is "six hundred sixty thousand, two hundred seventy-five".