667788833 has 2 divisors, whose sum is σ = 667788834. Its totient is φ = 667788832.

The previous prime is 667788811. The next prime is 667788851. The reversal of 667788833 is 338887766.

667788833 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650913169 + 16875664 = 25513^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 667788833 - 2⁶ = 667788769 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a zygodrome in base 10.

It is not a weakly prime, because it can be changed into another prime (667718833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333894416 + 333894417.

It is an arithmetic number, because the mean of its divisors is an integer number (333894417).

Almost surely, 2^667788833 is an apocalyptic number.

It is an amenable number.

667788833 is a deficient number, since it is larger than the sum of its proper divisors (1).

667788833 is an equidigital number, since it uses as much as digits as its factorization.

667788833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 56.

The square root of 667788833 is about 25841.6104954780. The cubic root of 667788833 is about 874.0703412710.

The spelling of 667788833 in words is "six hundred sixty-seven million, seven hundred eighty-eight thousand, eight hundred thirty-three".