633966 has 16 divisors (see below), whose sum is σ = 1277904. Its totient is φ = 209664.

The previous prime is 633961. The next prime is 633967. The reversal of 633966 is 669336.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606 + ... + 1278.

It is an arithmetic number, because the mean of its divisors is an integer number (79869).

2⁶³³⁹⁶⁶ is an apocalyptic number.

633966 is an abundant number, since it is smaller than the sum of its proper divisors (643938).

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

633966 is a wasteful number, since it uses less digits than its factorization.

633966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835.

The product of its digits is 17496, while the sum is 33.

The square root of 633966 is about 796.2198188943. The cubic root of 633966 is about 85.9057015798.

The spelling of 633966 in words is "six hundred thirty-three thousand, nine hundred sixty-six".