801866 has 8 divisors (see below), whose sum is σ = 1295364. Its totient is φ = 370080.

The previous prime is 801859. The next prime is 801883. The reversal of 801866 is 668108.

It can be written as a sum of positive squares in 2 ways, for example, as 801025 + 841 = 895^2 + 29^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15395 + ... + 15446.

2⁸⁰¹⁸⁶⁶ is an apocalyptic number.

801866 is a deficient number, since it is larger than the sum of its proper divisors (493498).

801866 is a wasteful number, since it uses less digits than its factorization.

801866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30856.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 801866 is about 895.4697091471. The cubic root of 801866 is about 92.9038973338.

The spelling of 801866 in words is "eight hundred one thousand, eight hundred sixty-six".