660249 has 6 divisors (see below), whose sum is σ = 953706. Its totient is φ = 440160.

The previous prime is 660241. The next prime is 660251. The reversal of 660249 is 942066.

It can be written as a sum of positive squares in only one way, i.e., 632025 + 28224 = 795^2 + 168^2 .

It is not a de Polignac number, because 660249 - 2³ = 660241 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660249.

It is not an unprimeable number, because it can be changed into a prime (660241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36672 + ... + 36689.

It is an arithmetic number, because the mean of its divisors is an integer number (158951).

2⁶⁶⁰²⁴⁹ is an apocalyptic number.

It is an amenable number.

660249 is a deficient number, since it is larger than the sum of its proper divisors (293457).

660249 is a wasteful number, since it uses less digits than its factorization.

660249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73367 (or 73364 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 660249 is about 812.5570749184. The cubic root of 660249 is about 87.0768247287.

It can be divided in two parts, 660 and 249, that added together give a palindrome (909).

The spelling of 660249 in words is "six hundred sixty thousand, two hundred forty-nine".