633665 has 4 divisors (see below), whose sum is σ = 760404. Its totient is φ = 506928.

The previous prime is 633653. The next prime is 633667. The reversal of 633665 is 566336.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222784 + 410881 = 472^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 633665 - 2⁴ = 633649 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 633665.

It is not an unprimeable number, because it can be changed into a prime (633667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63362 + ... + 63371.

It is an arithmetic number, because the mean of its divisors is an integer number (190101).

2⁶³³⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

633665 is a deficient number, since it is larger than the sum of its proper divisors (126739).

633665 is a wasteful number, since it uses less digits than its factorization.

633665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126738.

The product of its digits is 9720, while the sum is 29.

The square root of 633665 is about 796.0307782994. The cubic root of 633665 is about 85.8921037373.

The spelling of 633665 in words is "six hundred thirty-three thousand, six hundred sixty-five".