666078 has 16 divisors (see below), whose sum is σ = 1522560. Its totient is φ = 190296.

The previous prime is 666073. The next prime is 666079. The reversal of 666078 is 870666.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 666078.

It is not an unprimeable number, because it can be changed into a prime (666073) 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, 7888 + ... + 7971.

It is an arithmetic number, because the mean of its divisors is an integer number (95160).

2⁶⁶⁶⁰⁷⁸ is an apocalyptic number.

666078 is an abundant number, since it is smaller than the sum of its proper divisors (856482).

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

666078 is a wasteful number, since it uses less digits than its factorization.

666078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15871.

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

The square root of 666078 is about 816.1360180754. The cubic root of 666078 is about 87.3323265169.

The spelling of 666078 in words is "six hundred sixty-six thousand, seventy-eight".