636966 has 24 divisors (see below), whose sum is σ = 1506024. Its totient is φ = 192960.

The previous prime is 636953. The next prime is 636967. The reversal of 636966 is 669636.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 636966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411 + ... + 1806.

It is an arithmetic number, because the mean of its divisors is an integer number (62751).

2⁶³⁶⁹⁶⁶ is an apocalyptic number.

636966 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

636966 is an abundant number, since it is smaller than the sum of its proper divisors (869058).

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

636966 is a wasteful number, since it uses less digits than its factorization.

636966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236 (or 3233 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 636966 is about 798.1014973047. The cubic root of 636966 is about 86.0409936167.

The spelling of 636966 in words is "six hundred thirty-six thousand, nine hundred sixty-six".