661107233 has 2 divisors, whose sum is σ = 661107234. Its totient is φ = 661107232.

The previous prime is 661107211. The next prime is 661107257. The reversal of 661107233 is 332701166.

661107233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661106944 + 289 = 25712^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 661107233 - 2²⁰ = 660058657 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 661107196 and 661107205.

It is not a weakly prime, because it can be changed into another prime (661107133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330553616 + 330553617.

It is an arithmetic number, because the mean of its divisors is an integer number (330553617).

Almost surely, 2^661107233 is an apocalyptic number.

It is an amenable number.

661107233 is a deficient number, since it is larger than the sum of its proper divisors (1).

661107233 is an equidigital number, since it uses as much as digits as its factorization.

661107233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 661107233 is about 25712.0056199434. The cubic root of 661107233 is about 871.1453769625.

Adding to 661107233 its reverse (332701166), we get a palindrome (993808399).

The spelling of 661107233 in words is "six hundred sixty-one million, one hundred seven thousand, two hundred thirty-three".