666279 has 8 divisors (see below), whose sum is σ = 987120. Its totient is φ = 444168.

The previous prime is 666277. The next prime is 666301. The reversal of 666279 is 972666.

666279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666279 - 2¹ = 666277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666277) 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, 12312 + ... + 12365.

It is an arithmetic number, because the mean of its divisors is an integer number (123390).

2⁶⁶⁶²⁷⁹ is an apocalyptic number.

666279 is a deficient number, since it is larger than the sum of its proper divisors (320841).

666279 is a wasteful number, since it uses less digits than its factorization.

666279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24686 (or 24680 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 666279 is about 816.2591500253. The cubic root of 666279 is about 87.3411102891.

It can be divided in two parts, 66 and 6279, that multiplied together give a palindrome (414414).

The spelling of 666279 in words is "six hundred sixty-six thousand, two hundred seventy-nine".