660495 has 16 divisors (see below), whose sum is σ = 1153152. Its totient is φ = 320160.

The previous prime is 660493. The next prime is 660503. The reversal of 660495 is 594066.

It is not a de Polignac number, because 660495 - 2¹ = 660493 is a prime.

660495 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1837 + ... + 2166.

It is an arithmetic number, because the mean of its divisors is an integer number (72072).

2⁶⁶⁰⁴⁹⁵ is an apocalyptic number.

660495 is a deficient number, since it is larger than the sum of its proper divisors (492657).

660495 is a wasteful number, since it uses less digits than its factorization.

660495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 660495 is about 812.7084348030. The cubic root of 660495 is about 87.0876379416.

The spelling of 660495 in words is "six hundred sixty thousand, four hundred ninety-five".