660290 has 8 divisors (see below), whose sum is σ = 1188540. Its totient is φ = 264112.

The previous prime is 660281. The next prime is 660299. The reversal of 660290 is 92066.

It is an interprime number because it is at equal distance from previous prime (660281) and next prime (660299).

It can be written as a sum of positive squares in 2 ways, for example, as 552049 + 108241 = 743^2 + 329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660290.

It is not an unprimeable number, because it can be changed into a prime (660299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33005 + ... + 33024.

2⁶⁶⁰²⁹⁰ is an apocalyptic number.

660290 is a deficient number, since it is larger than the sum of its proper divisors (528250).

660290 is a wasteful number, since it uses less digits than its factorization.

660290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66036.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 660290 is about 812.5823035238. The cubic root of 660290 is about 87.0786271173.

The spelling of 660290 in words is "six hundred sixty thousand, two hundred ninety".