666844273 has 8 divisors (see below), whose sum is σ = 705866400. Its totient is φ = 628214688.

The previous prime is 666844271. The next prime is 666844307. The reversal of 666844273 is 372448666.

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

It is a cyclic number.

It is not a de Polignac number, because 666844273 - 2¹ = 666844271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666844271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94636 + ... + 101437.

It is an arithmetic number, because the mean of its divisors is an integer number (88233300).

Almost surely, 2^666844273 is an apocalyptic number.

It is an amenable number.

666844273 is a deficient number, since it is larger than the sum of its proper divisors (39022127).

666844273 is a wasteful number, since it uses less digits than its factorization.

666844273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196271.

The product of its digits is 1161216, while the sum is 46.

The square root of 666844273 is about 25823.3280775349. The cubic root of 666844273 is about 873.6580345599.

The spelling of 666844273 in words is "six hundred sixty-six million, eight hundred forty-four thousand, two hundred seventy-three".