667231535291 has 2 divisors, whose sum is σ = 667231535292. Its totient is φ = 667231535290.

The previous prime is 667231535281. The next prime is 667231535293. The reversal of 667231535291 is 192535132766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667231535291 - 2¹⁸ = 667231273147 is a prime.

Together with 667231535293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (667231535293) 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, 333615767645 + 333615767646.

It is an arithmetic number, because the mean of its divisors is an integer number (333615767646).

Almost surely, 2^667231535291 is an apocalyptic number.

667231535291 is a deficient number, since it is larger than the sum of its proper divisors (1).

667231535291 is an equidigital number, since it uses as much as digits as its factorization.

667231535291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 50.

The spelling of 667231535291 in words is "six hundred sixty-seven billion, two hundred thirty-one million, five hundred thirty-five thousand, two hundred ninety-one".