660263 has 4 divisors (see below), whose sum is σ = 699120. Its totient is φ = 621408.

The previous prime is 660251. The next prime is 660271. The reversal of 660263 is 362066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 660263 - 2⁶ = 660199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19403 + ... + 19436.

It is an arithmetic number, because the mean of its divisors is an integer number (174780).

2⁶⁶⁰²⁶³ is an apocalyptic number.

660263 is a deficient number, since it is larger than the sum of its proper divisors (38857).

660263 is a wasteful number, since it uses less digits than its factorization.

660263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38856.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 660263 is about 812.5656896522. The cubic root of 660263 is about 87.0774401869.

The spelling of 660263 in words is "six hundred sixty thousand, two hundred sixty-three".