668954 has 16 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 280560.

The previous prime is 668947. The next prime is 668959. The reversal of 668954 is 459866.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668959) 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, 884 + ... + 1455.

It is an arithmetic number, because the mean of its divisors is an integer number (73710).

2⁶⁶⁸⁹⁵⁴ is an apocalyptic number.

668954 is a deficient number, since it is larger than the sum of its proper divisors (510406).

668954 is a wasteful number, since it uses less digits than its factorization.

668954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365.

The product of its digits is 51840, while the sum is 38.

The square root of 668954 is about 817.8960814187. The cubic root of 668954 is about 87.4578409147.

The spelling of 668954 in words is "six hundred sixty-eight thousand, nine hundred fifty-four".