664098 has 16 divisors (see below), whose sum is σ = 1338816. Its totient is φ = 219600.

The previous prime is 664091. The next prime is 664099. The reversal of 664098 is 890466.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (664091) 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, 540 + ... + 1272.

It is an arithmetic number, because the mean of its divisors is an integer number (83676).

2⁶⁶⁴⁰⁹⁸ is an apocalyptic number.

664098 is an abundant number, since it is smaller than the sum of its proper divisors (674718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664098 is a wasteful number, since it uses less digits than its factorization.

664098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 664098 is about 814.9220821649. The cubic root of 664098 is about 87.2457052152.

The spelling of 664098 in words is "six hundred sixty-four thousand, ninety-eight".