663711 has 8 divisors (see below), whose sum is σ = 923520. Its totient is φ = 423192.

The previous prime is 663709. The next prime is 663713. The reversal of 663711 is 117366.

It is an interprime number because it is at equal distance from previous prime (663709) and next prime (663713).

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

It is not a de Polignac number, because 663711 - 2¹ = 663709 is a prime.

It is an Ulam number.

663711 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663711.

It is not an unprimeable number, because it can be changed into a prime (663713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4741 + ... + 4878.

It is an arithmetic number, because the mean of its divisors is an integer number (115440).

2⁶⁶³⁷¹¹ is an apocalyptic number.

663711 is a deficient number, since it is larger than the sum of its proper divisors (259809).

663711 is a wasteful number, since it uses less digits than its factorization.

663711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9645.

The product of its digits is 756, while the sum is 24.

The square root of 663711 is about 814.6846015484. The cubic root of 663711 is about 87.2287545801.

The spelling of 663711 in words is "six hundred sixty-three thousand, seven hundred eleven".