872066 has 16 divisors (see below), whose sum is σ = 1492344. Its totient is φ = 378624.

The previous prime is 872057. The next prime is 872071. The reversal of 872066 is 660278.

It can be written as a sum of positive squares in 4 ways, for example, as 600625 + 271441 = 775^2 + 521^2 .

It is an unprimeable number.

872066 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545 + ... + 1428.

2⁸⁷²⁰⁶⁶ is an apocalyptic number.

872066 is a deficient number, since it is larger than the sum of its proper divisors (620278).

872066 is a wasteful number, since it uses less digits than its factorization.

872066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 872066 is about 933.8447408429. The cubic root of 872066 is about 95.5395339002.

The spelling of 872066 in words is "eight hundred seventy-two thousand, sixty-six".