666273 has 8 divisors (see below), whose sum is σ = 935200. Its totient is φ = 420768.

The previous prime is 666269. The next prime is 666277. The reversal of 666273 is 372666.

It is an interprime number because it is at equal distance from previous prime (666269) and next prime (666277).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666273 - 2² = 666269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 666273.

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, 5788 + ... + 5901.

It is an arithmetic number, because the mean of its divisors is an integer number (116900).

2⁶⁶⁶²⁷³ is an apocalyptic number.

It is an amenable number.

666273 is a deficient number, since it is larger than the sum of its proper divisors (268927).

666273 is a wasteful number, since it uses less digits than its factorization.

666273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11711.

The product of its digits is 9072, while the sum is 30.

The square root of 666273 is about 816.2554747136. The cubic root of 666273 is about 87.3408481125.

It can be divided in two parts, 666 and 273, that added together give a palindrome (939).

The spelling of 666273 in words is "six hundred sixty-six thousand, two hundred seventy-three".