6661933 has 2 divisors, whose sum is σ = 6661934. Its totient is φ = 6661932.

The previous prime is 6661901. The next prime is 6661957. The reversal of 6661933 is 3391666.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6487209 + 174724 = 2547^2 + 418^2 .

It is a cyclic number.

It is not a de Polignac number, because 6661933 - 2⁵ = 6661901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6667933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330966 + 3330967.

It is an arithmetic number, because the mean of its divisors is an integer number (3330967).

Almost surely, 2^6661933 is an apocalyptic number.

It is an amenable number.

6661933 is a deficient number, since it is larger than the sum of its proper divisors (1).

6661933 is an equidigital number, since it uses as much as digits as its factorization.

6661933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 34.

The square root of 6661933 is about 2581.0720640850. The cubic root of 6661933 is about 188.1626497200.

The spelling of 6661933 in words is "six million, six hundred sixty-one thousand, nine hundred thirty-three".