663098 has 4 divisors (see below), whose sum is σ = 994650. Its totient is φ = 331548.

The previous prime is 663097. The next prime is 663127. The reversal of 663098 is 890366.

It is a happy number.

663098 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 890366 = 2 ⋅445183.

It can be written as a sum of positive squares in only one way, i.e., 635209 + 27889 = 797^2 + 167^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (663097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165773 + ... + 165776.

2⁶⁶³⁰⁹⁸ is an apocalyptic number.

663098 is a deficient number, since it is larger than the sum of its proper divisors (331552).

663098 is a wasteful number, since it uses less digits than its factorization.

663098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331551.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 663098 is about 814.3082954262. The cubic root of 663098 is about 87.2018916347.

The spelling of 663098 in words is "six hundred sixty-three thousand, ninety-eight".