801666673597 has 2 divisors, whose sum is σ = 801666673598. Its totient is φ = 801666673596.

The previous prime is 801666673553. The next prime is 801666673607. The reversal of 801666673597 is 795376666108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 557372737476 + 244293936121 = 746574^2 + 494261^2 .

It is a cyclic number.

It is not a de Polignac number, because 801666673597 - 2¹¹ = 801666671549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801666673537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400833336798 + 400833336799.

It is an arithmetic number, because the mean of its divisors is an integer number (400833336799).

Almost surely, 2^801666673597 is an apocalyptic number.

It is an amenable number.

801666673597 is a deficient number, since it is larger than the sum of its proper divisors (1).

801666673597 is an equidigital number, since it uses as much as digits as its factorization.

801666673597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68584320, while the sum is 64.

The spelling of 801666673597 in words is "eight hundred one billion, six hundred sixty-six million, six hundred seventy-three thousand, five hundred ninety-seven".