668698267 has 2 divisors, whose sum is σ = 668698268. Its totient is φ = 668698266.

The previous prime is 668698253. The next prime is 668698273. The reversal of 668698267 is 762896866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668698267 - 2¹¹ = 668696219 is a prime.

It is not a weakly prime, because it can be changed into another prime (668698237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334349133 + 334349134.

It is an arithmetic number, because the mean of its divisors is an integer number (334349134).

Almost surely, 2^668698267 is an apocalyptic number.

668698267 is a deficient number, since it is larger than the sum of its proper divisors (1).

668698267 is an equidigital number, since it uses as much as digits as its factorization.

668698267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 58.

The square root of 668698267 is about 25859.2008190508. The cubic root of 668698267 is about 874.4669480370.

The spelling of 668698267 in words is "six hundred sixty-eight million, six hundred ninety-eight thousand, two hundred sixty-seven".