996666 has 16 divisors (see below), whose sum is σ = 2174688. Its totient is φ = 302000.

The previous prime is 996649. The next prime is 996689. The reversal of 996666 is 666699.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

996666 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, 7485 + ... + 7616.

It is an arithmetic number, because the mean of its divisors is an integer number (135918).

2⁹⁹⁶⁶⁶⁶ is an apocalyptic number.

996666 is an abundant number, since it is smaller than the sum of its proper divisors (1178022).

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

996666 is a wasteful number, since it uses less digits than its factorization.

996666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15117.

The product of its digits is 104976, while the sum is 42.

The square root of 996666 is about 998.3316082345. The cubic root of 996666 is about 99.8887429312. Note that the first 3 decimals are identical.

It can be divided in two parts, 9966 and 66, that multiplied together give a palindrome (657756).

The spelling of 996666 in words is "nine hundred ninety-six thousand, six hundred sixty-six".