667089231797 has 2 divisors, whose sum is σ = 667089231798. Its totient is φ = 667089231796.

The previous prime is 667089231727. The next prime is 667089231857. The reversal of 667089231797 is 797132980766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 506992417156 + 160096814641 = 712034^2 + 400121^2 .

It is a cyclic number.

It is not a de Polignac number, because 667089231797 - 2⁸ = 667089231541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667089231727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333544615898 + 333544615899.

It is an arithmetic number, because the mean of its divisors is an integer number (333544615899).

Almost surely, 2^667089231797 is an apocalyptic number.

It is an amenable number.

667089231797 is a deficient number, since it is larger than the sum of its proper divisors (1).

667089231797 is an equidigital number, since it uses as much as digits as its factorization.

667089231797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48009024, while the sum is 65.

The spelling of 667089231797 in words is "six hundred sixty-seven billion, eighty-nine million, two hundred thirty-one thousand, seven hundred ninety-seven".