668154 has 16 divisors (see below), whose sum is σ = 1406880. Its totient is φ = 210960.

The previous prime is 668153. The next prime is 668159. The reversal of 668154 is 451866.

It is not an unprimeable number, because it can be changed into a prime (668153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2817 + ... + 3044.

It is an arithmetic number, because the mean of its divisors is an integer number (87930).

2⁶⁶⁸¹⁵⁴ is an apocalyptic number.

668154 is an abundant number, since it is smaller than the sum of its proper divisors (738726).

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

668154 is a wasteful number, since it uses less digits than its factorization.

668154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885.

The product of its digits is 5760, while the sum is 30.

The square root of 668154 is about 817.4068754299. The cubic root of 668154 is about 87.4229634881.

The spelling of 668154 in words is "six hundred sixty-eight thousand, one hundred fifty-four".