660256223 has 6 divisors (see below), whose sum is σ = 725736312. Its totient is φ = 600232820.

The previous prime is 660256189. The next prime is 660256237. The reversal of 660256223 is 322652066.

It is not a de Polignac number, because 660256223 - 2¹⁸ = 659994079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660256223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660256243) 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, 2728211 + ... + 2728452.

It is an arithmetic number, because the mean of its divisors is an integer number (120956052).

Almost surely, 2^660256223 is an apocalyptic number.

660256223 is a deficient number, since it is larger than the sum of its proper divisors (65480089).

660256223 is a wasteful number, since it uses less digits than its factorization.

660256223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5456685 (or 5456674 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 660256223 is about 25695.4514068152. The cubic root of 660256223 is about 870.7714226223.

The spelling of 660256223 in words is "six hundred sixty million, two hundred fifty-six thousand, two hundred twenty-three".