663307 has 4 divisors (see below), whose sum is σ = 684736. Its totient is φ = 641880.

The previous prime is 663301. The next prime is 663319. The reversal of 663307 is 703366.

It is a happy number.

663307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 663307 - 2¹¹ = 661259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663301) 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, 10668 + ... + 10729.

It is an arithmetic number, because the mean of its divisors is an integer number (171184).

2⁶⁶³³⁰⁷ is an apocalyptic number.

663307 is a deficient number, since it is larger than the sum of its proper divisors (21429).

663307 is a wasteful number, since it uses less digits than its factorization.

663307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21428.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 663307 is about 814.4366150905. The cubic root of 663307 is about 87.2110523123.

The spelling of 663307 in words is "six hundred sixty-three thousand, three hundred seven".