985666 has 12 divisors (see below), whose sum is σ = 1625526. Its totient is φ = 447920.

The previous prime is 985657. The next prime is 985667. The reversal of 985666 is 666589.

It can be written as a sum of positive squares in only one way, i.e., 958441 + 27225 = 979^2 + 165^2 .

It is not an unprimeable number, because it can be changed into a prime (985667) by changing a digit.

985666 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 5 ways as a sum of consecutive naturals, for example, 1795 + ... + 2278.

2⁹⁸⁵⁶⁶⁶ is an apocalyptic number.

985666 is a deficient number, since it is larger than the sum of its proper divisors (639860).

985666 is a wasteful number, since it uses less digits than its factorization.

985666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097 (or 4086 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 985666 is about 992.8071313201. The cubic root of 985666 is about 99.5198987163.

The spelling of 985666 in words is "nine hundred eighty-five thousand, six hundred sixty-six".