668830 has 8 divisors (see below), whose sum is σ = 1203912. Its totient is φ = 267528.

The previous prime is 668821. The next prime is 668851. The reversal of 668830 is 38866.

668830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 668792 and 668801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33432 + ... + 33451.

It is an arithmetic number, because the mean of its divisors is an integer number (150489).

2⁶⁶⁸⁸³⁰ is an apocalyptic number.

668830 is a deficient number, since it is larger than the sum of its proper divisors (535082).

668830 is a wasteful number, since it uses less digits than its factorization.

668830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66890.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 668830 is about 817.8202736543. The cubic root of 668830 is about 87.4524367353.

The spelling of 668830 in words is "six hundred sixty-eight thousand, eight hundred thirty".