661166333 has 2 divisors, whose sum is σ = 661166334. Its totient is φ = 661166332.

The previous prime is 661166327. The next prime is 661166339. The reversal of 661166333 is 333661166.

It is a balanced prime because it is at equal distance from previous prime (661166327) and next prime (661166339).

It can be written as a sum of positive squares in only one way, i.e., 563492644 + 97673689 = 23738^2 + 9883^2 .

It is a cyclic number.

It is not a de Polignac number, because 661166333 - 2⁶ = 661166269 is a prime.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 661166293 and 661166302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661166339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330583166 + 330583167.

It is an arithmetic number, because the mean of its divisors is an integer number (330583167).

Almost surely, 2^661166333 is an apocalyptic number.

It is an amenable number.

661166333 is a deficient number, since it is larger than the sum of its proper divisors (1).

661166333 is an equidigital number, since it uses as much as digits as its factorization.

661166333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The square root of 661166333 is about 25713.1548628324. The cubic root of 661166333 is about 871.1713350094.

The spelling of 661166333 in words is "six hundred sixty-one million, one hundred sixty-six thousand, three hundred thirty-three".