660534233 has 2 divisors, whose sum is σ = 660534234. Its totient is φ = 660534232.

The previous prime is 660534211. The next prime is 660534253. The reversal of 660534233 is 332435066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654950464 + 5583769 = 25592^2 + 2363^2 .

It is a cyclic number.

It is not a de Polignac number, because 660534233 - 2¹⁸ = 660272089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660534233.

It is not a weakly prime, because it can be changed into another prime (660534253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330267116 + 330267117.

It is an arithmetic number, because the mean of its divisors is an integer number (330267117).

Almost surely, 2^660534233 is an apocalyptic number.

It is an amenable number.

660534233 is a deficient number, since it is larger than the sum of its proper divisors (1).

660534233 is an equidigital number, since it uses as much as digits as its factorization.

660534233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 32.

The square root of 660534233 is about 25700.8605497948. The cubic root of 660534233 is about 870.8936222499.

Adding to 660534233 its reverse (332435066), we get a palindrome (992969299).

The spelling of 660534233 in words is "six hundred sixty million, five hundred thirty-four thousand, two hundred thirty-three".