668834 has 8 divisors (see below), whose sum is σ = 1010988. Its totient is φ = 331840.

The previous prime is 668821. The next prime is 668851. The reversal of 668834 is 438866.

It can be written as a sum of positive squares in 2 ways, for example, as 644809 + 24025 = 803^2 + 155^2 .

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 = 668794 and 668803.

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, 947 + ... + 1494.

2⁶⁶⁸⁸³⁴ is an apocalyptic number.

668834 is a deficient number, since it is larger than the sum of its proper divisors (342154).

668834 is a wasteful number, since it uses less digits than its factorization.

668834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580.

The product of its digits is 27648, while the sum is 35.

The square root of 668834 is about 817.8227191757. The cubic root of 668834 is about 87.4526110741.

The spelling of 668834 in words is "six hundred sixty-eight thousand, eight hundred thirty-four".