660925 has 6 divisors (see below), whose sum is σ = 819578. Its totient is φ = 528720.

The previous prime is 660923. The next prime is 660941. The reversal of 660925 is 529066.

It can be written as a sum of positive squares in 3 ways, for example, as 116281 + 544644 = 341^2 + 738^2 .

It is not a de Polignac number, because 660925 - 2¹ = 660923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660893 and 660902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13194 + ... + 13243.

2⁶⁶⁰⁹²⁵ is an apocalyptic number.

It is an amenable number.

660925 is a deficient number, since it is larger than the sum of its proper divisors (158653).

660925 is a wasteful number, since it uses less digits than its factorization.

660925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26447 (or 26442 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 660925 is about 812.9729392790. The cubic root of 660925 is about 87.1065326397.

The spelling of 660925 in words is "six hundred sixty thousand, nine hundred twenty-five".