669598 has 16 divisors (see below), whose sum is σ = 1077120. Its totient is φ = 311256.

The previous prime is 669577. The next prime is 669607. The reversal of 669598 is 895966.

It is a super-2 number, since 2×669598² = 896722963208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

669598 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2415 + ... + 2677.

It is an arithmetic number, because the mean of its divisors is an integer number (67320).

2⁶⁶⁹⁵⁹⁸ is an apocalyptic number.

669598 is a deficient number, since it is larger than the sum of its proper divisors (407522).

669598 is a wasteful number, since it uses less digits than its factorization.

669598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its digits is 116640, while the sum is 43.

The square root of 669598 is about 818.2896797589. The cubic root of 669598 is about 87.4858970468.

The spelling of 669598 in words is "six hundred sixty-nine thousand, five hundred ninety-eight".