660575233 has 2 divisors, whose sum is σ = 660575234. Its totient is φ = 660575232.

The previous prime is 660575213. The next prime is 660575257. The reversal of 660575233 is 332575066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419922064 + 240653169 = 20492^2 + 15513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660575233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660575192 and 660575201.

It is not a weakly prime, because it can be changed into another prime (660575213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330287616 + 330287617.

It is an arithmetic number, because the mean of its divisors is an integer number (330287617).

Almost surely, 2^660575233 is an apocalyptic number.

It is an amenable number.

660575233 is a deficient number, since it is larger than the sum of its proper divisors (1).

660575233 is an equidigital number, since it uses as much as digits as its factorization.

660575233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 37.

The square root of 660575233 is about 25701.6581760788. The cubic root of 660575233 is about 870.9116409475.

The spelling of 660575233 in words is "six hundred sixty million, five hundred seventy-five thousand, two hundred thirty-three".