663386 has 4 divisors (see below), whose sum is σ = 995082. Its totient is φ = 331692.

The previous prime is 663371. The next prime is 663407. The reversal of 663386 is 683366.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 398161 + 265225 = 631^2 + 515^2 .

It is an unprimeable number.

663386 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 165845 + ... + 165848.

2⁶⁶³³⁸⁶ is an apocalyptic number.

663386 is a deficient number, since it is larger than the sum of its proper divisors (331696).

663386 is a wasteful number, since it uses less digits than its factorization.

663386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331695.

The product of its digits is 15552, while the sum is 32.

The square root of 663386 is about 814.4851134306. The cubic root of 663386 is about 87.2145144596.

The spelling of 663386 in words is "six hundred sixty-three thousand, three hundred eighty-six".