66969343 has 4 divisors (see below), whose sum is σ = 76536400. Its totient is φ = 57402288.

The previous prime is 66969289. The next prime is 66969347. The reversal of 66969343 is 34396966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66969343 - 2²¹ = 64872191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66969293 and 66969302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66969347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4783518 + ... + 4783531.

It is an arithmetic number, because the mean of its divisors is an integer number (19134100).

Almost surely, 2^66969343 is an apocalyptic number.

66969343 is a deficient number, since it is larger than the sum of its proper divisors (9567057).

66969343 is an equidigital number, since it uses as much as digits as its factorization.

66969343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9567056.

The product of its digits is 629856, while the sum is 46.

The square root of 66969343 is about 8183.4798832770. The cubic root of 66969343 is about 406.0928528922.

The spelling of 66969343 in words is "sixty-six million, nine hundred sixty-nine thousand, three hundred forty-three".