663807 has 8 divisors (see below), whose sum is σ = 888880. Its totient is φ = 440640.

The previous prime is 663797. The next prime is 663821. The reversal of 663807 is 708366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 663807 - 2¹⁵ = 631039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663827) 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, 957 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (111110).

2⁶⁶³⁸⁰⁷ is an apocalyptic number.

663807 is a deficient number, since it is larger than the sum of its proper divisors (225073).

663807 is a wasteful number, since it uses less digits than its factorization.

663807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 663807 is about 814.7435179245. The cubic root of 663807 is about 87.2329600032.

The spelling of 663807 in words is "six hundred sixty-three thousand, eight hundred seven".