663707 has 4 divisors (see below), whose sum is σ = 724056. Its totient is φ = 603360.

The previous prime is 663683. The next prime is 663709. The reversal of 663707 is 707366.

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 663707 - 2¹² = 659611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663707.

It is not an unprimeable number, because it can be changed into a prime (663709) 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, 30158 + ... + 30179.

It is an arithmetic number, because the mean of its divisors is an integer number (181014).

2⁶⁶³⁷⁰⁷ is an apocalyptic number.

663707 is a deficient number, since it is larger than the sum of its proper divisors (60349).

663707 is a wasteful number, since it uses less digits than its factorization.

663707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60348.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 663707 is about 814.6821466069. The cubic root of 663707 is about 87.2285793453.

It can be divided in two parts, 66 and 3707, that added together give a palindrome (3773).

The spelling of 663707 in words is "six hundred sixty-three thousand, seven hundred seven".