666276 has 24 divisors (see below), whose sum is σ = 1674624. Its totient is φ = 204960.

The previous prime is 666269. The next prime is 666277. The reversal of 666276 is 672666.

It is a nialpdrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 666276.

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, 1980 + ... + 2291.

It is an arithmetic number, because the mean of its divisors is an integer number (69776).

2⁶⁶⁶²⁷⁶ is an apocalyptic number.

It is an amenable number.

666276 is an abundant number, since it is smaller than the sum of its proper divisors (1008348).

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

666276 is a wasteful number, since it uses less digits than its factorization.

666276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4291 (or 4289 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 666276 is about 816.2573123715. The cubic root of 666276 is about 87.3409792010.

The spelling of 666276 in words is "six hundred sixty-six thousand, two hundred seventy-six".