801663 has 8 divisors (see below), whose sum is σ = 1073328. Its totient is φ = 532224.

The previous prime is 801641. The next prime is 801677. The reversal of 801663 is 366108.

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

It is not a de Polignac number, because 801663 - 2⁵ = 801631 is a prime.

801663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801683) 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, 681 + ... + 1437.

It is an arithmetic number, because the mean of its divisors is an integer number (134166).

2⁸⁰¹⁶⁶³ is an apocalyptic number.

801663 is a deficient number, since it is larger than the sum of its proper divisors (271665).

801663 is a wasteful number, since it uses less digits than its factorization.

801663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 801663 is about 895.3563536380. The cubic root of 801663 is about 92.8960568373.

The spelling of 801663 in words is "eight hundred one thousand, six hundred sixty-three".