663497 has 8 divisors (see below), whose sum is σ = 688200. Its totient is φ = 639360.

The previous prime is 663463. The next prime is 663517. The reversal of 663497 is 794366.

It can be written as a sum of positive squares in 4 ways, for example, as 5776 + 657721 = 76^2 + 811^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 663497 - 2⁸ = 663241 is a prime.

It is a d-powerful number, because it can be written as 6 + 6⁵ + 4³ + 3¹² + 9⁴ + 7⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663407) 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, 4379 + ... + 4527.

It is an arithmetic number, because the mean of its divisors is an integer number (86025).

2⁶⁶³⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

663497 is a deficient number, since it is larger than the sum of its proper divisors (24703).

663497 is a wasteful number, since it uses less digits than its factorization.

663497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283.

The product of its digits is 27216, while the sum is 35.

The square root of 663497 is about 814.5532517890. The cubic root of 663497 is about 87.2193785313.

The spelling of 663497 in words is "six hundred sixty-three thousand, four hundred ninety-seven".