660320233 has 2 divisors, whose sum is σ = 660320234. Its totient is φ = 660320232.

The previous prime is 660320203. The next prime is 660320251. The reversal of 660320233 is 332023066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649842064 + 10478169 = 25492^2 + 3237^2 .

It is a cyclic number.

It is not a de Polignac number, because 660320233 - 2¹⁷ = 660189161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660320198 and 660320207.

It is not a weakly prime, because it can be changed into another prime (660320203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330160116 + 330160117.

It is an arithmetic number, because the mean of its divisors is an integer number (330160117).

Almost surely, 2^660320233 is an apocalyptic number.

It is an amenable number.

660320233 is a deficient number, since it is larger than the sum of its proper divisors (1).

660320233 is an equidigital number, since it uses as much as digits as its factorization.

660320233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 25.

The square root of 660320233 is about 25696.6969278155. The cubic root of 660320233 is about 870.7995613336.

Adding to 660320233 its reverse (332023066), we get a palindrome (992343299).

The spelling of 660320233 in words is "six hundred sixty million, three hundred twenty thousand, two hundred thirty-three".