668874 has 16 divisors (see below), whose sum is σ = 1370880. Its totient is φ = 217440.

The previous prime is 668873. The next prime is 668879. The reversal of 668874 is 478866.

It is not an unprimeable number, because it can be changed into a prime (668873) 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, 1114 + ... + 1605.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2⁶⁶⁸⁸⁷⁴ is an apocalyptic number.

668874 is an abundant number, since it is smaller than the sum of its proper divisors (702006).

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

668874 is a wasteful number, since it uses less digits than its factorization.

668874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765.

The product of its digits is 64512, while the sum is 39.

The square root of 668874 is about 817.8471739879. The cubic root of 668874 is about 87.4543544238.

The spelling of 668874 in words is "six hundred sixty-eight thousand, eight hundred seventy-four".