1320668267 has 2 divisors, whose sum is σ = 1320668268. Its totient is φ = 1320668266.

The previous prime is 1320668263. The next prime is 1320668287. The reversal of 1320668267 is 7628660231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320668267 - 2² = 1320668263 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320668263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660334133 + 660334134.

It is an arithmetic number, because the mean of its divisors is an integer number (660334134).

Almost surely, 2^1320668267 is an apocalyptic number.

1320668267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320668267 is an equidigital number, since it uses as much as digits as its factorization.

1320668267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 1320668267 is about 36340.9998073801. Note that the first 3 decimals coincide. The cubic root of 1320668267 is about 1097.1463961864.

The spelling of 1320668267 in words is "one billion, three hundred twenty million, six hundred sixty-eight thousand, two hundred sixty-seven".