330670721 has 2 divisors, whose sum is σ = 330670722. Its totient is φ = 330670720.

The previous prime is 330670693. The next prime is 330670727. The reversal of 330670721 is 127076033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311134321 + 19536400 = 17639^2 + 4420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-330670721 is a prime.

It is not a weakly prime, because it can be changed into another prime (330670727) 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, 165335360 + 165335361.

It is an arithmetic number, because the mean of its divisors is an integer number (165335361).

Almost surely, 2^330670721 is an apocalyptic number.

It is an amenable number.

330670721 is a deficient number, since it is larger than the sum of its proper divisors (1).

330670721 is an equidigital number, since it uses as much as digits as its factorization.

330670721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 330670721 is about 18184.3537416098. The cubic root of 330670721 is about 691.5101845516.

The spelling of 330670721 in words is "three hundred thirty million, six hundred seventy thousand, seven hundred twenty-one".