66843373 has 4 divisors (see below), whose sum is σ = 67939228. Its totient is φ = 65747520.

The previous prime is 66843367. The next prime is 66843377. The reversal of 66843373 is 37334866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37334866 = 2 ⋅18667433.

It can be written as a sum of positive squares in 2 ways, for example, as 23639044 + 43204329 = 4862^2 + 6573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66843373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66843377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547836 + ... + 547957.

It is an arithmetic number, because the mean of its divisors is an integer number (16984807).

Almost surely, 2^66843373 is an apocalyptic number.

It is an amenable number.

66843373 is a deficient number, since it is larger than the sum of its proper divisors (1095855).

66843373 is a wasteful number, since it uses less digits than its factorization.

66843373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095854.

The product of its digits is 217728, while the sum is 40.

The square root of 66843373 is about 8175.7796570113. The cubic root of 66843373 is about 405.8380715120.

The spelling of 66843373 in words is "sixty-six million, eight hundred forty-three thousand, three hundred seventy-three".