668076 has 12 divisors (see below), whose sum is σ = 1558872. Its totient is φ = 222688.

The previous prime is 668069. The next prime is 668089. The reversal of 668076 is 670866.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 14.

It is an unprimeable number.

668076 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27825 + ... + 27848.

It is an arithmetic number, because the mean of its divisors is an integer number (129906).

2⁶⁶⁸⁰⁷⁶ is an apocalyptic number.

It is an amenable number.

668076 is an abundant number, since it is smaller than the sum of its proper divisors (890796).

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

668076 is a wasteful number, since it uses less digits than its factorization.

668076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55680 (or 55678 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 668076 is about 817.3591621802. The cubic root of 668076 is about 87.4195614498.

The spelling of 668076 in words is "six hundred sixty-eight thousand, seventy-six".