66671243 has 8 divisors (see below), whose sum is σ = 67683168. Its totient is φ = 65666944.

The previous prime is 66671233. The next prime is 66671249. The reversal of 66671243 is 34217666.

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 66671243 - 2¹² = 66667147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66671249) 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, 17105 + ... + 20637.

It is an arithmetic number, because the mean of its divisors is an integer number (8460396).

Almost surely, 2^66671243 is an apocalyptic number.

66671243 is a deficient number, since it is larger than the sum of its proper divisors (1011925).

66671243 is a wasteful number, since it uses less digits than its factorization.

66671243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813.

The product of its digits is 36288, while the sum is 35.

The square root of 66671243 is about 8165.2460465071. The cubic root of 66671243 is about 405.4894108872.

The spelling of 66671243 in words is "sixty-six million, six hundred seventy-one thousand, two hundred forty-three".