849666 has 32 divisors (see below), whose sum is σ = 1824768. Its totient is φ = 263120.

The previous prime is 849649. The next prime is 849691. The reversal of 849666 is 666948.

849666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 849666.

It is an unprimeable number.

849666 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 15 ways as a sum of consecutive naturals, for example, 6421 + ... + 6551.

It is an arithmetic number, because the mean of its divisors is an integer number (57024).

2⁸⁴⁹⁶⁶⁶ is an apocalyptic number.

849666 is an abundant number, since it is smaller than the sum of its proper divisors (975102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

849666 is a wasteful number, since it uses less digits than its factorization.

849666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206.

The product of its digits is 62208, while the sum is 39.

The square root of 849666 is about 921.7732909995. The cubic root of 849666 is about 94.7144147366.

It can be divided in two parts, 84966 and 6, that multiplied together give a square (509796 = 714²).

The spelling of 849666 in words is "eight hundred forty-nine thousand, six hundred sixty-six".