801666317 has 8 divisors (see below), whose sum is σ = 821620800. Its totient is φ = 781731040.

The previous prime is 801666289. The next prime is 801666361. The reversal of 801666317 is 713666108.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 801666317 - 2⁶ = 801666253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801666377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118184 + ... + 124782.

It is an arithmetic number, because the mean of its divisors is an integer number (102702600).

Almost surely, 2^801666317 is an apocalyptic number.

It is an amenable number.

801666317 is a deficient number, since it is larger than the sum of its proper divisors (19954483).

801666317 is a wasteful number, since it uses less digits than its factorization.

801666317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9603.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 801666317 is about 28313.7125259122. The cubic root of 801666317 is about 928.9618496084.

The spelling of 801666317 in words is "eight hundred one million, six hundred sixty-six thousand, three hundred seventeen".