667297369 has 2 divisors, whose sum is σ = 667297370. Its totient is φ = 667297368.

The previous prime is 667297357. The next prime is 667297403. The reversal of 667297369 is 963792766.

667297369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646939225 + 20358144 = 25435^2 + 4512^2 .

It is a cyclic number.

It is not a de Polignac number, because 667297369 - 2⁹ = 667296857 is a prime.

It is a super-2 number, since 2×667297369² = 890571557348644322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (667297339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333648684 + 333648685.

It is an arithmetic number, because the mean of its divisors is an integer number (333648685).

Almost surely, 2^667297369 is an apocalyptic number.

It is an amenable number.

667297369 is a deficient number, since it is larger than the sum of its proper divisors (1).

667297369 is an equidigital number, since it uses as much as digits as its factorization.

667297369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 55.

The square root of 667297369 is about 25832.0995855931. The cubic root of 667297369 is about 873.8558625263.

The spelling of 667297369 in words is "six hundred sixty-seven million, two hundred ninety-seven thousand, three hundred sixty-nine".